diff --git a/composer.json b/composer.json
index 217acad..20aa809 100644
--- a/composer.json
+++ b/composer.json
@@ -32,6 +32,7 @@
         "friends-of-phpspec/phpspec-code-coverage": "^6.0.0",
         "infection/infection": "^0.23 || ^0.24",
         "infection/phpspec-adapter": "^0.1.2",
+        "loophp/psr17": "^1.0",
         "monolog/monolog": "^1.0",
         "nyholm/psr7": "^1.4",
         "nyholm/psr7-server": "^1.0.0",
@@ -40,6 +41,10 @@
         "symfony/cache": "^5.2",
         "symfony/http-client": "^5.2"
     },
+    "suggest": {
+        "loophp/psr17": "Provides a PSR17 synthetic implementation",
+        "nyholm/psr7": "A super lightweight PSR-7 implementation"
+    },
     "autoload": {
         "psr-4": {
             "EcPhp\\CasLib\\": "./src/"
diff --git a/spec/EcPhp/CasLib/CasSpec.php b/spec/EcPhp/CasLib/CasSpec.php
index a03ad3e..c26da80 100644
--- a/spec/EcPhp/CasLib/CasSpec.php
+++ b/spec/EcPhp/CasLib/CasSpec.php
@@ -28,12 +28,7 @@
 use Psr\Cache\CacheItemInterface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientInterface;
-use Psr\Http\Message\RequestFactoryInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
 use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Log\LoggerInterface;
 use spec\EcPhp\CasLib\Cas as CasSpecUtils;
 use Symfony\Component\Cache\CacheItem;
@@ -72,20 +67,16 @@ public function it_can_authenticate()
     }
 
     /**
-     * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Message\ServerRequestInterface $serverRequest
      * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Client\ClientInterface $client
-     * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Message\UriFactoryInterface $uriFactory
-     * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Message\RequestFactoryInterface $requestFactory
-     * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Message\ResponseFactoryInterface $responseFactory
-     * @param \PhpSpec\Wrapper\Collaborator|\Psr\Http\Message\StreamFactoryInterface $streamFactory
      * @param \PhpSpec\Wrapper\Collaborator|\Psr\Cache\CacheItemPoolInterface $cache
      * @param \PhpSpec\Wrapper\Collaborator|\Psr\Log\LoggerInterface $logger
      *
      * @throws \Psr\Cache\InvalidArgumentException
      */
-    public function it_can_authenticate_a_request(ServerRequestInterface $serverRequest, ClientInterface $client, UriFactoryInterface $uriFactory, RequestFactoryInterface $requestFactory, ResponseFactoryInterface $responseFactory, StreamFactoryInterface $streamFactory, CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_can_authenticate_a_request(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -99,7 +90,7 @@ public function it_can_authenticate_a_request(ServerRequestInterface $serverRequ
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request('GET', UtilsUri::withParams(new Uri('http://from'), ['ticket' => 'ST-TICKET-VALID']));
 
@@ -154,6 +145,7 @@ public function it_can_authenticate_a_request(ServerRequestInterface $serverRequ
     public function it_can_authenticate_a_request_in_proxy_mode(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -175,7 +167,7 @@ public function it_can_authenticate_a_request_in_proxy_mode(ClientInterface $cli
             ->hasItem('pgtIouWithPgtIdNull')
             ->willReturn(false);
 
-        $this->beConstructedWith(CasSpecUtils::getTestPropertiesWithPgtUrl(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestPropertiesWithPgtUrl(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request('GET', UtilsUri::withParams(new Uri('http://from'), ['ticket' => 'ST-TICKET-VALID']));
 
@@ -266,8 +258,9 @@ public function it_can_be_constructed_without_base_url(LoggerInterface $logger,
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new ServerRequest('GET', 'http://foo');
 
@@ -280,6 +273,7 @@ public function it_can_be_constructed_without_base_url(LoggerInterface $logger,
     public function it_can_check_if_the_logger_works_during_a_failed_authentication_of_service_ticket(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -293,7 +287,7 @@ public function it_can_check_if_the_logger_works_during_a_failed_authentication_
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -328,9 +322,10 @@ public function it_can_check_if_the_logger_works_during_a_failed_authentication_
             ->shouldHaveBeenCalledOnce();
     }
 
-    public function it_can_check_if_the_logger_works_during_a_failed_proxy_validate_request(ServerRequestInterface $serverRequest, ClientInterface $client, UriFactoryInterface $uriFactory, RequestFactoryInterface $requestFactory, ResponseFactoryInterface $responseFactory, StreamFactoryInterface $streamFactory, CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_can_check_if_the_logger_works_during_a_failed_proxy_validate_request(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -352,7 +347,7 @@ public function it_can_check_if_the_logger_works_during_a_failed_proxy_validate_
             )
         );
 
-        $this->beConstructedWith(CasSpecUtils::getTestPropertiesWithPgtUrl(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestPropertiesWithPgtUrl(), $client, $psr17, $cache, $logger, new Introspector());
 
         $this
             ->requestProxyValidate($request)
@@ -363,9 +358,10 @@ public function it_can_check_if_the_logger_works_during_a_failed_proxy_validate_
             ->shouldHaveBeenCalledOnce();
     }
 
-    public function it_can_check_if_the_logger_works_during_a_failed_service_validate_request(ServerRequestInterface $serverRequest, ClientInterface $client, UriFactoryInterface $uriFactory, RequestFactoryInterface $requestFactory, ResponseFactoryInterface $responseFactory, StreamFactoryInterface $streamFactory, CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_can_check_if_the_logger_works_during_a_failed_service_validate_request(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -379,7 +375,7 @@ public function it_can_check_if_the_logger_works_during_a_failed_service_validat
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -398,9 +394,10 @@ public function it_can_check_if_the_logger_works_during_a_failed_service_validat
             ->shouldHaveBeenCalledOnce();
     }
 
-    public function it_can_check_if_the_logger_works_during_a_successful_authentication_of_service_ticket(ServerRequestInterface $serverRequest, ClientInterface $client, UriFactoryInterface $uriFactory, RequestFactoryInterface $requestFactory, ResponseFactoryInterface $responseFactory, StreamFactoryInterface $streamFactory, CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_can_check_if_the_logger_works_during_a_successful_authentication_of_service_ticket(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $cacheItem = new CacheItem();
@@ -414,7 +411,7 @@ public function it_can_check_if_the_logger_works_during_a_successful_authenticat
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -541,8 +538,9 @@ public function it_can_detect_wrong_url(LoggerInterface $logger, CacheItemPoolIn
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $parameters = [
             'service' => 'service',
@@ -818,7 +816,8 @@ public function it_can_parse_a_bad_proxy_request_response(CacheItemPoolInterface
     {
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -838,7 +837,8 @@ public function it_can_parse_a_good_proxy_request_response(CacheItemPoolInterfac
     {
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -874,7 +874,8 @@ public function it_can_parse_json_in_a_response(LoggerInterface $logger, CacheIt
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -916,8 +917,8 @@ public function it_can_request_a_proxy_ticket(LoggerInterface $logger, CacheItem
     {
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -965,8 +966,8 @@ public function it_can_validate_a_bad_proxy_ticket(LoggerInterface $logger, Cach
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'POST',
@@ -986,7 +987,8 @@ public function it_can_validate_a_bad_service_validate_request(LoggerInterface $
     {
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith(CasSpecUtils::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'POST',
@@ -1058,7 +1060,8 @@ public function it_can_validate_a_good_proxy_ticket(LoggerInterface $logger, Cac
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -1146,7 +1149,8 @@ public function it_can_validate_a_good_service_validate_request(LoggerInterface
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -1228,6 +1232,7 @@ public function let(LoggerInterface $logger, CacheItemPoolInterface $cache, Cach
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $cacheItemPgtIou
             ->set('pgtId')
@@ -1281,6 +1286,6 @@ public function let(LoggerInterface $logger, CacheItemPoolInterface $cache, Cach
             ->getItem('pgtIouWithPgtIdNull')
             ->willReturn($cacheItemPgtIdNull);
 
-        $this->beConstructedWith($properties, $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith($properties, $client, $psr17, $cache, $logger, new Introspector());
     }
 }
diff --git a/spec/EcPhp/CasLib/Handler/ProxyCallbackSpec.php b/spec/EcPhp/CasLib/Handler/ProxyCallbackSpec.php
index 545bbc7..56cbdfb 100644
--- a/spec/EcPhp/CasLib/Handler/ProxyCallbackSpec.php
+++ b/spec/EcPhp/CasLib/Handler/ProxyCallbackSpec.php
@@ -14,6 +14,7 @@
 use EcPhp\CasLib\Handler\ProxyCallback;
 use EcPhp\CasLib\Utils\Uri as UtilsUri;
 use Exception;
+use loophp\psr17\Psr17;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Nyholm\Psr7\Request;
 use Nyholm\Psr7\Uri;
@@ -28,6 +29,7 @@ class ProxyCallbackSpec extends ObjectBehavior
     public function it_can_catch_issue_with_the_cache(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $request = new Request(
             'GET',
@@ -58,7 +60,7 @@ public function it_can_catch_issue_with_the_cache(CacheItemPoolInterface $cache,
             ->save($cacheItem)
             ->willReturn(true);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $this
             ->handle($request);
@@ -92,8 +94,9 @@ public function it_can_test_if_the_cache_is_working(CacheItemPoolInterface $cach
     public function it_can_test_the_logger_when_missing_pgtId(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -116,8 +119,9 @@ public function it_can_test_the_logger_when_missing_pgtId(CacheItemPoolInterface
     public function it_can_test_the_logger_when_missing_pgtIou(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -140,8 +144,9 @@ public function it_can_test_the_logger_when_missing_pgtIou(CacheItemPoolInterfac
     public function it_can_test_the_logger_when_no_parameter_is_in_the_url(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -162,6 +167,7 @@ public function it_can_test_the_logger_when_no_parameter_is_in_the_url(CacheItem
     public function it_can_test_the_logger_when_parameters_are_in_the_url(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $cacheItem
             ->set('pgtId')
@@ -179,7 +185,7 @@ public function it_can_test_the_logger_when_parameters_are_in_the_url(CacheItemP
             ->save($cacheItem)
             ->willReturn(true);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -208,6 +214,7 @@ public function it_is_initializable()
     public function let(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $cacheItem
             ->set('pgtId')
@@ -225,6 +232,6 @@ public function let(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem
             ->save($cacheItem)
             ->willReturn(true);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
     }
 }
diff --git a/spec/EcPhp/CasLib/Redirect/LoginSpec.php b/spec/EcPhp/CasLib/Redirect/LoginSpec.php
index ce5f80c..551043c 100644
--- a/spec/EcPhp/CasLib/Redirect/LoginSpec.php
+++ b/spec/EcPhp/CasLib/Redirect/LoginSpec.php
@@ -12,6 +12,8 @@
 namespace spec\EcPhp\CasLib\Redirect;
 
 use EcPhp\CasLib\Redirect\Login;
+use loophp\psr17\Psr17;
+use loophp\psr17\Psr17Interface;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Nyholm\Psr7\Request;
 use Nyholm\Psr7\Uri;
@@ -26,17 +28,18 @@ class LoginSpec extends ObjectBehavior
     public function it_can_deal_with_array_parameters(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
-
-        $request = new Request(
-            'GET',
-            new Uri('http://from/it_can_deal_with_array_parameters')
-        );
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $parameters = [
             'custom' => range(1, 5),
         ];
 
-        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17, $cache, $logger);
+
+        $request = new Request(
+            'GET',
+            new Uri('http://from/it_can_deal_with_array_parameters')
+        );
 
         $this
             ->handle($request)
@@ -51,6 +54,7 @@ public function it_can_deal_with_array_parameters(CacheItemPoolInterface $cache,
     public function it_can_deal_with_renew_and_gateway_parameters(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $parameters = [
             'renew' => true,
@@ -58,7 +62,7 @@ public function it_can_deal_with_renew_and_gateway_parameters(CacheItemPoolInter
             'service' => 'service',
         ];
 
-        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -91,13 +95,14 @@ public function it_can_deal_with_renew_and_gateway_parameters(CacheItemPoolInter
     public function it_can_deal_with_renew_parameter(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $parameters = [
             'renew' => 'coin',
             'gateway' => false,
         ];
 
-        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith($parameters, Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -121,7 +126,9 @@ public function it_can_deal_with_renew_parameter(CacheItemPoolInterface $cache,
     public function it_can_get_a_response(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -133,10 +140,9 @@ public function it_can_get_a_response(CacheItemPoolInterface $cache, LoggerInter
             ->shouldBeAnInstanceOf(ResponseInterface::class);
     }
 
-    public function it_is_initializable(CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_is_initializable(CacheItemPoolInterface $cache, LoggerInterface $logger, Psr17Interface $psr17)
     {
-        $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $this->shouldHaveType(Login::class);
     }
diff --git a/spec/EcPhp/CasLib/Redirect/LogoutSpec.php b/spec/EcPhp/CasLib/Redirect/LogoutSpec.php
index e186ecb..38fff0d 100644
--- a/spec/EcPhp/CasLib/Redirect/LogoutSpec.php
+++ b/spec/EcPhp/CasLib/Redirect/LogoutSpec.php
@@ -12,6 +12,8 @@
 namespace spec\EcPhp\CasLib\Redirect;
 
 use EcPhp\CasLib\Redirect\Logout;
+use loophp\psr17\Psr17;
+use loophp\psr17\Psr17Interface;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Nyholm\Psr7\Request;
 use Nyholm\Psr7\Uri;
@@ -26,7 +28,8 @@ class LogoutSpec extends ObjectBehavior
     public function it_can_get_a_response(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $request = new Request(
             'GET',
@@ -38,10 +41,9 @@ public function it_can_get_a_response(CacheItemPoolInterface $cache, LoggerInter
             ->shouldBeAnInstanceOf(ResponseInterface::class);
     }
 
-    public function it_is_initializable(CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function it_is_initializable(CacheItemPoolInterface $cache, LoggerInterface $logger, Psr17Interface $psr17)
     {
-        $psr17Factory = new Psr17Factory();
-        $this->beConstructedWith([], Cas::getTestProperties(), $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger);
+        $this->beConstructedWith([], Cas::getTestProperties(), $psr17, $cache, $logger);
 
         $this->shouldHaveType(Logout::class);
     }
diff --git a/spec/EcPhp/CasLib/Service/ProxySpec.php b/spec/EcPhp/CasLib/Service/ProxySpec.php
index fcd33e8..f93ed6b 100644
--- a/spec/EcPhp/CasLib/Service/ProxySpec.php
+++ b/spec/EcPhp/CasLib/Service/ProxySpec.php
@@ -13,7 +13,7 @@
 
 use EcPhp\CasLib\Introspection\Introspector;
 use EcPhp\CasLib\Service\Proxy;
-use Nyholm\Psr7\Factory\Psr17Factory;
+use loophp\psr17\Psr17Interface;
 use Nyholm\Psr7\Response;
 use PhpSpec\ObjectBehavior;
 use Psr\Cache\CacheItemPoolInterface;
@@ -58,10 +58,8 @@ public function it_is_initializable()
         $this->shouldHaveType(Proxy::class);
     }
 
-    public function let(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
+    public function let(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger, Psr17Interface $psr17)
     {
-        $psr17Factory = new Psr17Factory();
-
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
     }
 }
diff --git a/spec/EcPhp/CasLib/Service/ProxyValidateSpec.php b/spec/EcPhp/CasLib/Service/ProxyValidateSpec.php
index 7443395..b2ecd6b 100644
--- a/spec/EcPhp/CasLib/Service/ProxyValidateSpec.php
+++ b/spec/EcPhp/CasLib/Service/ProxyValidateSpec.php
@@ -13,6 +13,7 @@
 
 use EcPhp\CasLib\Introspection\Introspector;
 use EcPhp\CasLib\Service\ProxyValidate;
+use loophp\psr17\Psr17;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Nyholm\Psr7\Request;
 use Nyholm\Psr7\Response;
@@ -41,6 +42,7 @@ public function it_can_detect_when_no_credentials()
     public function it_can_get_credentials_with_pgtUrl(ClientInterface $client, CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
@@ -68,7 +70,7 @@ public function it_can_get_credentials_with_pgtUrl(ClientInterface $client, Cach
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith([], Cas::getTestPropertiesWithPgtUrl(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestPropertiesWithPgtUrl(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -92,10 +94,11 @@ public function it_can_get_credentials_with_pgtUrl(ClientInterface $client, Cach
     public function it_can_get_credentials_without_pgtUrl(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $request = new Request(
             'GET',
@@ -124,7 +127,8 @@ public function it_is_initializable()
     public function let(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
     }
 }
diff --git a/spec/tests/EcPhp/CasLib/CasSpec.php b/spec/tests/EcPhp/CasLib/CasSpec.php
index 048bced..96ff142 100644
--- a/spec/tests/EcPhp/CasLib/CasSpec.php
+++ b/spec/tests/EcPhp/CasLib/CasSpec.php
@@ -31,16 +31,14 @@ public function it_can_test_the_proxy_mode_with_pgtUrl()
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $introspector = new Introspector();
 
         $this->beConstructedWith(new Cas(
             $properties,
             $client,
-            $psr17Factory,
-            $psr17Factory,
-            $psr17Factory,
-            $psr17Factory,
+            $psr17,
             new ArrayAdapter(),
             new NullLogger(),
             $introspector
@@ -64,16 +62,14 @@ public function it_can_test_the_proxy_mode_without_pgtUrl()
         $client = new Psr18Client(CasSpecUtils::getHttpClientMock());
 
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $introspector = new Introspector();
 
         $this->beConstructedWith(new Cas(
             $properties,
             $client,
-            $psr17Factory,
-            $psr17Factory,
-            $psr17Factory,
-            $psr17Factory,
+            $psr17,
             new ArrayAdapter(),
             new NullLogger(),
             $introspector
diff --git a/spec/tests/EcPhp/CasLib/Service/ProxyValidateSpec.php b/spec/tests/EcPhp/CasLib/Service/ProxyValidateSpec.php
index da297e5..92fbfdc 100644
--- a/spec/tests/EcPhp/CasLib/Service/ProxyValidateSpec.php
+++ b/spec/tests/EcPhp/CasLib/Service/ProxyValidateSpec.php
@@ -13,6 +13,7 @@
 
 use EcPhp\CasLib\Introspection\Contract\IntrospectorInterface;
 use EcPhp\CasLib\Introspection\Introspector;
+use loophp\psr17\Psr17;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Nyholm\Psr7\Request;
 use Nyholm\Psr7\Response;
@@ -21,10 +22,6 @@
 use Psr\Cache\CacheItemInterface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientInterface;
-use Psr\Http\Message\RequestFactoryInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Log\LoggerInterface;
 use spec\EcPhp\CasLib\Cas;
 use Symfony\Component\HttpClient\Psr18Client;
@@ -35,6 +32,7 @@ class ProxyValidateSpec extends ObjectBehavior
     public function it_can_check_the_visibility_of_some_methods(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $client = new Psr18Client(Cas::getHttpClientMock());
 
@@ -62,7 +60,7 @@ public function it_can_check_the_visibility_of_some_methods(CacheItemPoolInterfa
             ->getItem('pgtIou')
             ->willReturn($cacheItem);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $this
             ->getClient()
@@ -76,22 +74,6 @@ public function it_can_check_the_visibility_of_some_methods(CacheItemPoolInterfa
             ->getCache()
             ->shouldBeAnInstanceOf(CacheItemPoolInterface::class);
 
-        $this
-            ->getUriFactory()
-            ->shouldBeAnInstanceOf(UriFactoryInterface::class);
-
-        $this
-            ->getStreamFactory()
-            ->shouldBeAnInstanceOf(StreamFactoryInterface::class);
-
-        $this
-            ->getRequestFactory()
-            ->shouldBeAnInstanceOf(RequestFactoryInterface::class);
-
-        $this
-            ->getResponseFactory()
-            ->shouldBeAnInstanceOf(ResponseFactoryInterface::class);
-
         $this
             ->getIntrospector()
             ->shouldBeAnInstanceOf(IntrospectorInterface::class);
@@ -129,14 +111,14 @@ public function it_can_detect_when_no_credentials()
     public function it_can_log_debugging_information_when_trying_to_get_unexisting_pgtIou(CacheItemPoolInterface $cache, CacheItemInterface $cacheItem, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
-
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
         $client = new Psr18Client(Cas::getHttpClientMock());
 
         $cache
             ->hasItem('pgtIou')
             ->willReturn(false);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $response = [
             'serviceResponse' => [
@@ -158,10 +140,11 @@ public function it_can_log_debugging_information_when_trying_to_get_unexisting_p
     public function it_can_parse_a_response(CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
         $client = new Psr18Client(Cas::getHttpClientMock());
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
 
         $response = new Response(200, [], 'foo');
         $request = new Request(
@@ -186,7 +169,8 @@ public function it_is_initializable()
     public function let(ClientInterface $client, CacheItemPoolInterface $cache, LoggerInterface $logger)
     {
         $psr17Factory = new Psr17Factory();
+        $psr17 = new Psr17($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
 
-        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory, $cache, $logger, new Introspector());
+        $this->beConstructedWith([], Cas::getTestProperties(), $client, $psr17, $cache, $logger, new Introspector());
     }
 }
diff --git a/src/Cas.php b/src/Cas.php
index 283920c..6e5b07a 100644
--- a/src/Cas.php
+++ b/src/Cas.php
@@ -21,14 +21,11 @@
 use EcPhp\CasLib\Service\ProxyValidate;
 use EcPhp\CasLib\Service\ServiceValidate;
 use EcPhp\CasLib\Utils\Uri;
+use loophp\psr17\Psr17Interface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientInterface;
-use Psr\Http\Message\RequestFactoryInterface;
 use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
 use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Log\LoggerInterface;
 
 use function array_key_exists;
@@ -47,34 +44,22 @@ final class Cas implements CasInterface
 
     private PropertiesInterface $properties;
 
-    private RequestFactoryInterface $requestFactory;
-
-    private ResponseFactoryInterface $responseFactory;
-
-    private StreamFactoryInterface $streamFactory;
-
-    private UriFactoryInterface $uriFactory;
+    private Psr17Interface $psr17;
 
     public function __construct(
         PropertiesInterface $properties,
         ClientInterface $client,
-        UriFactoryInterface $uriFactory,
-        ResponseFactoryInterface $responseFactory,
-        RequestFactoryInterface $requestFactory,
-        StreamFactoryInterface $streamFactory,
+        Psr17Interface $psr17,
         CacheItemPoolInterface $cache,
         LoggerInterface $logger,
         IntrospectorInterface $introspector
     ) {
-        $this->properties = $properties;
-        $this->client = $client;
-        $this->uriFactory = $uriFactory;
-        $this->responseFactory = $responseFactory;
-        $this->requestFactory = $requestFactory;
-        $this->streamFactory = $streamFactory;
         $this->cache = $cache;
-        $this->logger = $logger;
+        $this->client = $client;
         $this->introspector = $introspector;
+        $this->logger = $logger;
+        $this->properties = $properties;
+        $this->psr17 = $psr17;
     }
 
     public function authenticate(RequestInterface $request, array $parameters = []): ?array
@@ -108,9 +93,7 @@ public function handleProxyCallback(
         $proxyCallback = new ProxyCallback(
             $parameters,
             $this->getProperties(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger()
         );
@@ -123,9 +106,7 @@ public function login(RequestInterface $request, array $parameters = []): ?Respo
         $login = new Login(
             $parameters,
             $this->getProperties(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger()
         );
@@ -138,9 +119,7 @@ public function logout(RequestInterface $request, array $parameters = []): ?Resp
         $logout = new Logout(
             $parameters,
             $this->getProperties(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger()
         );
@@ -156,10 +135,7 @@ public function requestProxyTicket(
             $parameters,
             $this->getProperties(),
             $this->getHttpClient(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getRequestFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger(),
             $this->getIntrospector()
@@ -192,10 +168,7 @@ public function requestProxyValidate(
             $parameters,
             $this->getProperties(),
             $this->getHttpClient(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getRequestFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger(),
             $this->getIntrospector()
@@ -228,10 +201,7 @@ public function requestServiceValidate(
             $parameters,
             $this->getProperties(),
             $this->getHttpClient(),
-            $this->getUriFactory(),
-            $this->getResponseFactory(),
-            $this->getRequestFactory(),
-            $this->getStreamFactory(),
+            $this->getPsr17(),
             $this->getCache(),
             $this->getLogger(),
             $this->getIntrospector()
@@ -305,24 +275,9 @@ private function getLogger(): LoggerInterface
         return $this->logger;
     }
 
-    private function getRequestFactory(): RequestFactoryInterface
-    {
-        return $this->requestFactory;
-    }
-
-    private function getResponseFactory(): ResponseFactoryInterface
-    {
-        return $this->responseFactory;
-    }
-
-    private function getStreamFactory(): StreamFactoryInterface
-    {
-        return $this->streamFactory;
-    }
-
-    private function getUriFactory(): UriFactoryInterface
+    private function getPsr17(): Psr17Interface
     {
-        return $this->uriFactory;
+        return $this->psr17;
     }
 
     private function proxyMode(): bool
diff --git a/src/Handler/Handler.php b/src/Handler/Handler.php
index 8bcf6af..8a30694 100644
--- a/src/Handler/Handler.php
+++ b/src/Handler/Handler.php
@@ -13,11 +13,9 @@
 
 use EcPhp\CasLib\Configuration\PropertiesInterface;
 use EcPhp\CasLib\Utils\Uri;
+use loophp\psr17\Psr17Interface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Http\Message\UriInterface;
 use Psr\Log\LoggerInterface;
 
@@ -33,11 +31,7 @@ abstract class Handler
 
     private PropertiesInterface $properties;
 
-    private ResponseFactoryInterface $responseFactory;
-
-    private StreamFactoryInterface $streamFactory;
-
-    private UriFactoryInterface $uriFactory;
+    private Psr17Interface $psr17;
 
     /**
      * @param array[]|string[] $parameters
@@ -45,19 +39,15 @@ abstract class Handler
     public function __construct(
         array $parameters,
         PropertiesInterface $properties,
-        UriFactoryInterface $uriFactory,
-        ResponseFactoryInterface $responseFactory,
-        StreamFactoryInterface $streamFactory,
+        Psr17Interface $psr17,
         CacheItemPoolInterface $cache,
         LoggerInterface $logger
     ) {
-        $this->parameters = $parameters;
-        $this->properties = $properties;
-        $this->uriFactory = $uriFactory;
-        $this->responseFactory = $responseFactory;
-        $this->streamFactory = $streamFactory;
         $this->cache = $cache;
         $this->logger = $logger;
+        $this->parameters = $parameters;
+        $this->properties = $properties;
+        $this->psr17 = $psr17;
     }
 
     /**
@@ -101,7 +91,7 @@ static function ($item): bool {
             }
         );
 
-        return $this->getUriFactory()
+        return $this->getPsr17()
             ->createUri($properties['base_url'])
             ->withPath($baseUrl['path'] . $properties['protocol'][$name]['path'])
             ->withQuery(http_build_query($query))
@@ -127,7 +117,7 @@ static function ($parameter) {
         );
 
         if (true === array_key_exists('service', $parameters)) {
-            $service = $this->getUriFactory()->createUri(
+            $service = $this->getPsr17()->createUri(
                 $parameters['service']
             );
 
@@ -175,18 +165,8 @@ protected function getProtocolProperties(RequestInterface $request): array
         return [];
     }
 
-    protected function getResponseFactory(): ResponseFactoryInterface
-    {
-        return $this->responseFactory;
-    }
-
-    protected function getStreamFactory(): StreamFactoryInterface
-    {
-        return $this->streamFactory;
-    }
-
-    protected function getUriFactory(): UriFactoryInterface
+    protected function getPsr17(): Psr17Interface
     {
-        return $this->uriFactory;
+        return $this->psr17;
     }
 }
diff --git a/src/Handler/ProxyCallback.php b/src/Handler/ProxyCallback.php
index 56a3796..6dd26cb 100644
--- a/src/Handler/ProxyCallback.php
+++ b/src/Handler/ProxyCallback.php
@@ -21,7 +21,7 @@ final class ProxyCallback extends Handler implements HandlerInterface
     public function handle(RequestInterface $request): ?ResponseInterface
     {
         $response = $this
-            ->getResponseFactory()
+            ->getPsr17()
             ->createResponse(200);
 
         // POST parameters prevails over GET parameters.
diff --git a/src/Redirect/Redirect.php b/src/Redirect/Redirect.php
index f908170..fe746c3 100644
--- a/src/Redirect/Redirect.php
+++ b/src/Redirect/Redirect.php
@@ -23,7 +23,7 @@ protected function createRedirectResponse(string $url): ResponseInterface
             ->debug('Building service response redirection to {url}.', ['url' => $url]);
 
         return $this
-            ->getResponseFactory()
+            ->getPsr17()
             ->createResponse(302)
             ->withHeader('Location', $url);
     }
diff --git a/src/Service/Service.php b/src/Service/Service.php
index 7defb34..96c6793 100644
--- a/src/Service/Service.php
+++ b/src/Service/Service.php
@@ -16,15 +16,12 @@
 use EcPhp\CasLib\Introspection\Contract\IntrospectorInterface;
 use EcPhp\CasLib\Introspection\Contract\ServiceValidate;
 use InvalidArgumentException;
+use loophp\psr17\Psr17Interface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientExceptionInterface;
 use Psr\Http\Client\ClientInterface;
-use Psr\Http\Message\RequestFactoryInterface;
 use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
 use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Http\Message\UriInterface;
 use Psr\Log\LoggerInterface;
 
@@ -38,16 +35,11 @@ abstract class Service extends Handler
 
     private IntrospectorInterface $introspector;
 
-    private RequestFactoryInterface $requestFactory;
-
     public function __construct(
         array $parameters,
         PropertiesInterface $properties,
         ClientInterface $client,
-        UriFactoryInterface $uriFactory,
-        ResponseFactoryInterface $responseFactory,
-        RequestFactoryInterface $requestFactory,
-        StreamFactoryInterface $streamFactory,
+        Psr17Interface $psr17,
         CacheItemPoolInterface $cache,
         LoggerInterface $logger,
         IntrospectorInterface $introspector
@@ -55,15 +47,12 @@ public function __construct(
         parent::__construct(
             $parameters,
             $properties,
-            $uriFactory,
-            $responseFactory,
-            $streamFactory,
+            $psr17,
             $cache,
             $logger
         );
 
         $this->client = $client;
-        $this->requestFactory = $requestFactory;
         $this->introspector = $introspector;
     }
 
@@ -123,7 +112,7 @@ public function getCredentials(ResponseInterface $response): ?ResponseInterface
             ->debug('Proxy validation service successful.');
 
         return $response
-            ->withBody($this->getStreamFactory()->createStream($body))
+            ->withBody($this->getPsr17()->createStream($body))
             ->withHeader('Content-Type', 'application/json');
     }
 
@@ -152,11 +141,6 @@ protected function getIntrospector(): IntrospectorInterface
         return $this->introspector;
     }
 
-    protected function getRequestFactory(): RequestFactoryInterface
-    {
-        return $this->requestFactory;
-    }
-
     /**
      * Get the URI.
      */
@@ -258,7 +242,7 @@ private function normalize(RequestInterface $request, ResponseInterface $respons
             ->debug('Response normalization succeeded.', ['body' => $body]);
 
         return $response
-            ->withBody($this->getStreamFactory()->createStream($body))
+            ->withBody($this->getPsr17()->createStream($body))
             ->withHeader('Content-Type', 'application/json');
     }
 }
diff --git a/tests/Service/ProxyValidate.php b/tests/Service/ProxyValidate.php
index 0a86745..01662ff 100644
--- a/tests/Service/ProxyValidate.php
+++ b/tests/Service/ProxyValidate.php
@@ -16,12 +16,8 @@
 use EcPhp\CasLib\Utils\Uri;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientInterface;
-use Psr\Http\Message\RequestFactoryInterface;
 use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseFactoryInterface;
 use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\StreamFactoryInterface;
-use Psr\Http\Message\UriFactoryInterface;
 use Psr\Http\Message\UriInterface;
 use Psr\Log\LoggerInterface;
 
@@ -47,26 +43,6 @@ public function getLogger(): LoggerInterface
         return parent::getLogger();
     }
 
-    public function getRequestFactory(): RequestFactoryInterface
-    {
-        return parent::getRequestFactory();
-    }
-
-    public function getResponseFactory(): ResponseFactoryInterface
-    {
-        return parent::getResponseFactory();
-    }
-
-    public function getStreamFactory(): StreamFactoryInterface
-    {
-        return parent::getStreamFactory();
-    }
-
-    public function getUriFactory(): UriFactoryInterface
-    {
-        return parent::getUriFactory();
-    }
-
     public function parse(RequestInterface $request, ResponseInterface $response): array
     {
         return parent::parse($request, $response);