diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4e383dc..8df59b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,7 @@ jobs:
     strategy:
       matrix:
         php:
+          - 8.1
           - 8.0
           - 7.4
           - 7.3
diff --git a/README.md b/README.md
index ebdb165..170f2e3 100644
--- a/README.md
+++ b/README.md
@@ -90,7 +90,7 @@ $ composer require clue/reactphp-eventsource:dev-master
 
 This project aims to run on any platform and thus does not require any PHP
 extensions and supports running on legacy PHP 5.4 through current PHP 8+.
-It's *highly recommended to use PHP 7+* for this project.
+It's *highly recommended to use the latest supported PHP version* for this project.
 
 ## Tests
 
diff --git a/composer.json b/composer.json
index 8e42707..f34cdb4 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "php": ">=5.4",
         "evenement/evenement": "^3.0 || ^2.0",
         "react/event-loop": "^1.2",
-        "react/http": "^1.5"
+        "react/http": "^1.6"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.3 || ^5.7 || ^4.8.35"
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 7822452..5550341 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -4,8 +4,9 @@
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          bootstrap="vendor/autoload.php"
+         cacheResult="false"
          colors="true"
-         cacheResult="false">
+         convertDeprecationsToExceptions="true">
     <testsuites>
         <testsuite name="EventSource Test Suite">
             <directory>./tests/</directory>