diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c709a01..6b84581 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -1,6 +1,10 @@
 name: Build
 
-on: push
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
 
 jobs:
   build:
@@ -9,44 +13,40 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [7.2, 7.3, 7.4]
-        coverage: ["true"]
+        php: [ 8.0, 8.1, 8.2, 8.3 ]
+        coverage: [ "false" ]
         include:
-        - php: 8.0
-          coverage: "false" # PHPUnit 8.5.14 doesn't support code coverage under PHP 8
-        - php: 8.1
-          coverage: "false" # PHPUnit 8.5.14 doesn't support code coverage under PHP 8
-        - php: 8.2
-          coverage: "false" # PHPUnit 8.5.14 doesn't support code coverage under PHP 8
+          - php: 8.0
+            coverage: "true" # Collecting coverage reports only once
 
     steps:
-    - name: Checkout
-      uses: actions/checkout@v2
-
-    - name: Setup PHP & Composer
-      uses: shivammathur/setup-php@v2
-      with:
-        php-version: ${{ matrix.php }}
-        tools: composer:v2
-
-    - name: Install dependencies
-      run: composer install --no-interaction --no-suggest
-
-    - name: PHPUnit
-      env:
-        COVERAGE: ${{ matrix.coverage }}
-      run: |
-        [ $COVERAGE = "true" ] \
-          && mkdir -p build/logs && ./vendor/bin/phpunit --coverage-clover build/logs/clover.xml \
-          || ./vendor/bin/phpunit
-
-    - name: Psalm
-      run: |
-        ./vendor/bin/psalm --shepherd
-
-    - name: Coveralls
-      if: ${{ matrix.coverage == 'true' }}
-      env:
-        COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        ./vendor/bin/php-coveralls -v
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP & Composer
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+
+      - name: Install dependencies
+        run: composer install --no-interaction --no-suggest
+
+      - name: PHPUnit
+        env:
+          COVERAGE: ${{ matrix.coverage }}
+        run: |
+          [ $COVERAGE = "true" ] \
+            && mkdir -p build/logs && ./vendor/bin/phpunit --coverage-clover build/logs/clover.xml \
+            || ./vendor/bin/phpunit
+
+      - name: Psalm
+        run: |
+          ./vendor/bin/psalm --shepherd
+
+      - name: Coveralls
+        if: ${{ matrix.coverage == 'true' }}
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          ./vendor/bin/php-coveralls -v
diff --git a/composer.json b/composer.json
index e38a1da..0d66fab 100644
--- a/composer.json
+++ b/composer.json
@@ -4,16 +4,19 @@
     "type": "library",
     "license": "GPL-2.0-only",
     "require": {
-        "php": ">=7.2.0",
+        "php": ">=8.0.0",
         "ext-json": "*",
-        "oat-sa/lib-lti1p3-core": "^6.2"
+        "nesbot/carbon": "^2.72",
+        "nyholm/psr7": "^1.8",
+        "oat-sa/lib-lti1p3-core": "^7.0",
+        "psr/http-message": "^1.1"
     },
     "require-dev": {
         "cache/array-adapter": "^1.1",
-        "phpunit/phpunit": "8.5.14",
+        "phpunit/phpunit": "^9.6",
         "php-coveralls/php-coveralls": "^2.4",
         "vimeo/psalm": "^4.6",
-        "psalm/plugin-phpunit": "^0.15.1"
+        "psalm/plugin-phpunit": "^0.15"
     },
     "autoload": {
         "psr-4": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 84b07a9..5441481 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,27 +1,20 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
 <!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/8.5/phpunit.xsd"
-         backupGlobals="false"
-         colors="true"
->
-    <php>
-        <env name="TEST_KEYS_ROOT_DIR" value="file://vendor/oat-sa/lib-lti1p3-core/tests/Resource/Key/RSA" />
-    </php>
-
-    <testsuites>
-        <testsuite name="Integration">
-            <directory>tests/Integration</directory>
-        </testsuite>
-        <testsuite name="Unit">
-            <directory>tests/Unit</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory>src</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd" backupGlobals="false" colors="true">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory>src</directory>
+    </include>
+  </coverage>
+  <php>
+    <env name="TEST_KEYS_ROOT_DIR" value="file://vendor/oat-sa/lib-lti1p3-core/tests/Resource/Key/RSA"/>
+  </php>
+  <testsuites>
+    <testsuite name="Integration">
+      <directory>tests/Integration</directory>
+    </testsuite>
+    <testsuite name="Unit">
+      <directory>tests/Unit</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>
diff --git a/src/Service/Server/Handler/AcsServiceServerRequestHandler.php b/src/Service/Server/Handler/AcsServiceServerRequestHandler.php
index 513c950..1013982 100644
--- a/src/Service/Server/Handler/AcsServiceServerRequestHandler.php
+++ b/src/Service/Server/Handler/AcsServiceServerRequestHandler.php
@@ -22,8 +22,8 @@
 
 namespace OAT\Library\Lti1p3Proctoring\Service\Server\Handler;
 
-use Http\Message\ResponseFactory;
 use Nyholm\Psr7\Factory\HttplugFactory;
+use Nyholm\Psr7\Response;
 use OAT\Library\Lti1p3Core\Security\OAuth2\Validator\Result\RequestAccessTokenValidationResultInterface;
 use OAT\Library\Lti1p3Core\Service\Server\Handler\LtiServiceServerRequestHandlerInterface;
 use OAT\Library\Lti1p3Proctoring\Serializer\AcsControlResultSerializer;
@@ -49,19 +49,14 @@ class AcsServiceServerRequestHandler implements LtiServiceServerRequestHandlerIn
     /** @var AcsControlResultSerializerInterface */
     private $controlResultSerializer;
 
-    /** @var ResponseFactory */
-    private $factory;
-
     public function __construct(
         AcsServiceServerControlProcessorInterface $processor,
         ?AcsControlSerializerInterface $controlSerializer = null,
         ?AcsControlResultSerializerInterface $controlResultSerializer = null,
-        ?ResponseFactory $factory = null
     ) {
         $this->processor = $processor;
         $this->controlSerializer = $controlSerializer ?? new AcsControlSerializer();
         $this->controlResultSerializer = $controlResultSerializer ?? new AcsControlResultSerializer();
-        $this->factory = $factory ?? new HttplugFactory();
     }
 
     public function getServiceName(): string
@@ -106,6 +101,6 @@ public function handleValidatedServiceRequest(
             'Content-Length' => strlen($responseBody),
         ];
 
-        return $this->factory->createResponse(200, null, $responseHeaders, $responseBody);
+        return new Response(200, $responseHeaders, $responseBody);
     }
 }
diff --git a/tests/Integration/Service/Server/Handler/AcsServiceServerRequestHandlerTest.php b/tests/Integration/Service/Server/Handler/AcsServiceServerRequestHandlerTest.php
index c4844bd..c8e6242 100644
--- a/tests/Integration/Service/Server/Handler/AcsServiceServerRequestHandlerTest.php
+++ b/tests/Integration/Service/Server/Handler/AcsServiceServerRequestHandlerTest.php
@@ -89,7 +89,6 @@ protected function setUp(): void
         $this->server = new LtiServiceServer(
             $this->validatorMock,
             $this->subject,
-            null,
             $this->logger
         );
     }