diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb9321d..0efa5d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,20 @@
+# 5.0.0
+
+## BC Breaks
+
+Use PSR-7, PSR-17 and PSR-18 instead of HttpPlug.
+
+- Change the type of the first parameter of `Akeneo\PimEnterprise\ApiClient\AkeneoPimEnterpriseClientBuilder::setHttpClient` from `Http\Client\HttpClient` to `Psr\Http\Client\ClientInterface`
+- Change the type of the first parameter of `Akeneo\PimEnterprise\ApiClient\AkeneoPimEnterpriseClientBuilder::setRequestFactory` from `Http\Message\RequestFactory` to `Psr\Http\Message\RequestFactoryInterface`
+- Change the type of the first parameter of `Akeneo\PimEnterprise\ApiClient\AkeneoPimEnterpriseClientBuilder::setStreamFactory` from `Http\Message\StreamFactory` to `Psr\Http\Message\StreamFactoryInterface`
+
+Factory implementations are necessary as dependency.
+For example, with Guzzle:
+
+```bash
+$ php composer.phar require akeneo/api-php-client-ee php-http/guzzle6-adapter:^2.0 http-interop/http-factory-guzzle:^1.0
+```
+
 # 4.0.0 (2019-02-08)
 
 ## Improvements
diff --git a/composer.json b/composer.json
index 9c720a2..d487672 100644
--- a/composer.json
+++ b/composer.json
@@ -29,6 +29,7 @@
     "phpspec/phpspec": "^5.0",
     "symfony/yaml": "^4.2",
     "donatj/mock-webserver": "^2.0",
+    "http-interop/http-factory-guzzle": "^1.0",
     "php-http/guzzle6-adapter": "^2.0"
   },
   "config": {
diff --git a/docker-compose.yml.dist b/docker-compose.yml.dist
index 6b1bb78..397bf0c 100644
--- a/docker-compose.yml.dist
+++ b/docker-compose.yml.dist
@@ -8,7 +8,6 @@ services:
       PHP_IDE_CONFIG: 'serverName=akeneo-client'
       PHP_XDEBUG_ENABLED: 0
       PHP_XDEBUG_IDE_KEY: XDEBUG_IDE_KEY
-      PHP_XDEBUG_REMOTE_HOST: xxx.xxx.xxx.xxx
       XDEBUG_CONFIG: 'remote_host=xxx.xxx.xxx.xxx'
     user: docker
     volumes:
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index a240bcc..b941627 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -7,7 +7,7 @@
      convertErrorsToExceptions="true"
      convertNoticesToExceptions="true"
      convertWarningsToExceptions="true"
-     processIsolation="true"
+     processIsolation="false"
      stopOnFailure="false"
      syntaxCheck="false">
 
diff --git a/src/AkeneoPimEnterpriseClientBuilder.php b/src/AkeneoPimEnterpriseClientBuilder.php
index b920b7a..ea26879 100644
--- a/src/AkeneoPimEnterpriseClientBuilder.php
+++ b/src/AkeneoPimEnterpriseClientBuilder.php
@@ -42,12 +42,13 @@
 use Akeneo\PimEnterprise\ApiClient\Api\ReferenceEntityAttributeOptionApi;
 use Akeneo\PimEnterprise\ApiClient\Api\ReferenceEntityMediaFileApi;
 use Akeneo\PimEnterprise\ApiClient\Api\ReferenceEntityRecordApi;
-use Http\Client\HttpClient as Client;
-use Http\Discovery\HttpClientDiscovery;
-use Http\Discovery\MessageFactoryDiscovery;
-use Http\Discovery\StreamFactoryDiscovery;
+use Http\Discovery\Psr17FactoryDiscovery;
+use Http\Discovery\Psr18ClientDiscovery;
 use Http\Message\RequestFactory;
 use Http\Message\StreamFactory;
+use Psr\Http\Client\ClientInterface;
+use Psr\Http\Message\RequestFactoryInterface;
+use Psr\Http\Message\StreamFactoryInterface;
 
 /**
  * Builder of the class AkeneoPimEnterpriseClient.
@@ -62,7 +63,7 @@ class AkeneoPimEnterpriseClientBuilder
     /** @var string */
     protected $baseUri;
 
-    /** @var Client */
+    /** @var ClientInterface */
     protected $httpClient;
 
     /** @var RequestFactory */
@@ -83,13 +84,9 @@ public function __construct(string $baseUri)
     }
 
     /**
-     * Allows to directly set a client instead of using HttpClientDiscovery::find()
-     *
-     * @param Client $httpClient
-     *
-     * @return AkeneoPimClientBuilder
+     * Allows to directly set a client instead of using the discovery
      */
-    public function setHttpClient(Client $httpClient): self
+    public function setHttpClient(ClientInterface $httpClient): self
     {
         $this->httpClient = $httpClient;
 
@@ -97,13 +94,9 @@ public function setHttpClient(Client $httpClient): self
     }
 
     /**
-     * Allows to directly set a request factory instead of using MessageFactoryDiscovery::find()
-     *
-     * @param RequestFactory $requestFactory
-     *
-     * @return AkeneoPimClientBuilder
+     * Allows to directly set a request factory instead of using the discovery
      */
-    public function setRequestFactory(RequestFactory $requestFactory): self
+    public function setRequestFactory(RequestFactoryInterface $requestFactory): self
     {
         $this->requestFactory = $requestFactory;
 
@@ -111,13 +104,9 @@ public function setRequestFactory(RequestFactory $requestFactory): self
     }
 
     /**
-     * Allows to directly set a stream factory instead of using StreamFactoryDiscovery::find()
-     *
-     * @param StreamFactory $streamFactory
-     *
-     * @return AkeneoPimClientBuilder
+     * Allows to directly set a stream factory instead of using the discovery
      */
-    public function setStreamFactory(StreamFactory $streamFactory): self
+    public function setStreamFactory(StreamFactoryInterface $streamFactory): self
     {
         $this->streamFactory = $streamFactory;
 
@@ -224,7 +213,7 @@ protected function setUp(Authentication $authentication): array
     {
         $uriGenerator = new UriGenerator($this->baseUri);
 
-        $httpClient = new HttpClient($this->getHttpClient(), $this->getRequestFactory());
+        $httpClient = new HttpClient($this->getHttpClient(), $this->getRequestFactory(), $this->getStreamFactory());
         $authenticationApi = new AuthenticationApi($httpClient, $uriGenerator);
         $authenticatedHttpClient = new AuthenticatedHttpClient($httpClient, $authenticationApi, $authentication);
 
@@ -244,28 +233,28 @@ protected function setUp(Authentication $authentication): array
         return [$resourceClient, $pageFactory, $cursorFactory, $fileSystem];
     }
 
-    private function getHttpClient(): Client
+    private function getHttpClient(): ClientInterface
     {
         if (null === $this->httpClient) {
-            $this->httpClient = HttpClientDiscovery::find();
+            $this->httpClient = Psr18ClientDiscovery::find();
         }
 
         return $this->httpClient;
     }
 
-    private function getRequestFactory(): RequestFactory
+    private function getRequestFactory(): RequestFactoryInterface
     {
         if (null === $this->requestFactory) {
-            $this->requestFactory = MessageFactoryDiscovery::find();
+            $this->requestFactory = Psr17FactoryDiscovery::findRequestFactory();
         }
 
         return $this->requestFactory;
     }
 
-    private function getStreamFactory(): StreamFactory
+    private function getStreamFactory(): StreamFactoryInterface
     {
         if (null === $this->streamFactory) {
-            $this->streamFactory = StreamFactoryDiscovery::find();
+            $this->streamFactory = Psr17FactoryDiscovery::findStreamFactory();
         }
 
         return $this->streamFactory;
diff --git a/tests/Api/AssetReferenceFile/UploadAssetReferenceFileIntegration.php b/tests/Api/AssetReferenceFile/UploadAssetReferenceFileIntegration.php
index 7bd1f66..cc4bd36 100644
--- a/tests/Api/AssetReferenceFile/UploadAssetReferenceFileIntegration.php
+++ b/tests/Api/AssetReferenceFile/UploadAssetReferenceFileIntegration.php
@@ -104,7 +104,7 @@ public function test_upload_from_resource_file()
      */
     public function test_upload_for_an_unknown_asset()
     {
-        $filePath = realpath(__DIR__ . '/../../../fixtures/ziggy.png');
+        $filePath = realpath(__DIR__ . '/../../fixtures/ziggy.png');
 
         $this->server->setResponseOfPath(
             '/'. sprintf(AssetReferenceFileApi::ASSET_REFERENCE_FILE_URI, 'unknown_asset', 'en_US'),
@@ -123,7 +123,7 @@ public function test_upload_for_an_unknown_asset()
      */
     public function test_upload_a_file_that_cannot_be_transformed_for_the_variations()
     {
-        $filePath = realpath(__DIR__ . '/../../../fixtures/unicorn.png');
+        $filePath = realpath(__DIR__ . '/../../fixtures/unicorn.png');
 
         $this->server->setResponseOfPath(
             '/'. sprintf(AssetReferenceFileApi::ASSET_REFERENCE_FILE_URI, 'unicorn', AssetReferenceFileApi::NOT_LOCALIZABLE_ASSET_LOCALE_CODE),
diff --git a/tests/Api/AssetVariationFile/UploadAssetVariationFileApiIntegration.php b/tests/Api/AssetVariationFile/UploadAssetVariationFileApiIntegration.php
index 21c1efe..172db1c 100644
--- a/tests/Api/AssetVariationFile/UploadAssetVariationFileApiIntegration.php
+++ b/tests/Api/AssetVariationFile/UploadAssetVariationFileApiIntegration.php
@@ -105,7 +105,7 @@ public function test_upload_from_resource_file()
      */
     public function test_upload_for_an_unknown_asset()
     {
-        $filePath = realpath(__DIR__ . '/../../../fixtures/ziggy.png');
+        $filePath = realpath(__DIR__ . '/../../fixtures/ziggy.png');
 
         $this->server->setResponseOfPath(
             '/'. sprintf(AssetVariationFileApi::ASSET_VARIATION_FILE_URI, 'unknown_asset', 'ecommerce', 'en_US'),
@@ -124,7 +124,7 @@ public function test_upload_for_an_unknown_asset()
      */
     public function test_upload_for_an_asset_that_should_be_localizable()
     {
-        $filePath = realpath(__DIR__ . '/../../../fixtures/unicorn.png');
+        $filePath = realpath(__DIR__ . '/../../fixtures/unicorn.png');
 
         $this->server->setResponseOfPath(
             '/'. sprintf(AssetVariationFileApi::ASSET_VARIATION_FILE_URI, 'unicorn', 'ecommerce', AssetVariationFileApi::NOT_LOCALIZABLE_ASSET_LOCALE_CODE),