diff --git a/.github/workflows/ci-php.yaml b/.github/workflows/ci-php.yaml
index 8fa10073..6646136f 100644
--- a/.github/workflows/ci-php.yaml
+++ b/.github/workflows/ci-php.yaml
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        version: ["7.4", "8.0", "8.1", "8.2"]
+        version: ["8.1", "8.2", "8.3"]
     steps:
       - name: checkout
         uses: actions/checkout@v3
diff --git a/php/devcontainers/php-7.4/.devcontainer/devcontainer.json b/php/devcontainers/php-7.4/.devcontainer/devcontainer.json
deleted file mode 100644
index 39bfb95f..00000000
--- a/php/devcontainers/php-7.4/.devcontainer/devcontainer.json
+++ /dev/null
@@ -1,27 +0,0 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the
-// README at: https://github.com/devcontainers/templates/tree/main/src/php
-{
-	"name": "PHP",
-	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/php:0-7.4",
-	// Features to add to the dev container. More info: https://containers.dev/features.
-	// "features": {},
-	// Configure tool-specific properties.
-	// "customizations": {},
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	"forwardPorts": [
-		8080
-	],
-	// Use 'postCreateCommand' to run commands after the container is created.
-	// "postCreateCommand": "sudo chmod a+x \"$(pwd)\" && sudo rm -rf /var/www/html && sudo ln -s \"$(pwd)\" /var/www/html"
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	//"remoteUser": "root",
-	"customizations": {
-		"vscode": {
-			"extensions": [
-				"xdebug.php-debug",
-				"recca0120.vscode-phpunit"
-			]
-		}
-	}
-}
\ No newline at end of file
diff --git a/php/devcontainers/php-8.0/.devcontainer/devcontainer.json b/php/devcontainers/php-8.0/.devcontainer/devcontainer.json
deleted file mode 100644
index 92cc2bf7..00000000
--- a/php/devcontainers/php-8.0/.devcontainer/devcontainer.json
+++ /dev/null
@@ -1,27 +0,0 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the
-// README at: https://github.com/devcontainers/templates/tree/main/src/php
-{
-	"name": "PHP",
-	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/php:1-8.0",
-	// Features to add to the dev container. More info: https://containers.dev/features.
-	// "features": {},
-	// Configure tool-specific properties.
-	// "customizations": {},
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	"forwardPorts": [
-		8080
-	],
-	// Use 'postCreateCommand' to run commands after the container is created.
-	// "postCreateCommand": "sudo chmod a+x \"$(pwd)\" && sudo rm -rf /var/www/html && sudo ln -s \"$(pwd)\" /var/www/html"
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	//"remoteUser": "root",
-	"customizations": {
-		"vscode": {
-			"extensions": [
-				"xdebug.php-debug",
-				"recca0120.vscode-phpunit"
-			]
-		}
-	}
-}
\ No newline at end of file
diff --git a/php/src/vaas/composer.json b/php/src/vaas/composer.json
index a93d52b0..adfa0e43 100644
--- a/php/src/vaas/composer.json
+++ b/php/src/vaas/composer.json
@@ -13,13 +13,13 @@
     "license": "MIT",
     "homepage": "https://github.com/GDATASoftwareAG/vaas",
     "require": {
-        "php": "^7.4 || ^8",
+        "php": "^8.1",
         "ramsey/uuid": "^4.7 || ^4.2",
         "textalk/websocket": "^1.6 || ^1.5",
-        "netresearch/jsonmapper": "^4.1",
+        "netresearch/jsonmapper": "^4.4",
         "guzzlehttp/guzzle": "^7",
         "psr/log": "^1.1 || ^2.0 || ^3.0",
-        "league/oauth2-client": "^2.4.0"
+        "league/oauth2-client": "^2.7"
     },
     "autoload": {
         "psr-4": {
diff --git a/php/tests/vaas/VaasTest.php b/php/tests/vaas/VaasTest.php
index b437a842..0f432937 100644
--- a/php/tests/vaas/VaasTest.php
+++ b/php/tests/vaas/VaasTest.php
@@ -22,8 +22,6 @@
 use VaasSdk\Message\Verdict;
 use VaasSdk\Sha256;
 
-use function PHPUnit\Framework\assertEquals;
-
 final class VaasTest extends TestCase
 {
     use ProphecyTrait;
@@ -382,7 +380,8 @@ private function getUuid(): string
      * @throws VaasAuthenticationException
      * @throws TimeoutException
      */
-    public function testForUrl_WithInvalidUrl_ThrowsVaasClientException() {
+    public function testForUrl_WithInvalidUrl_ThrowsVaasClientException()
+    {
         $vaas = new Vaas($_ENV["VAAS_URL"], $this->_getDebugLogger());
         $this->expectException(\InvalidArgumentException::class);
         $this->expectExceptionMessage("Url is not valid");
@@ -397,7 +396,8 @@ public function testForUrl_WithInvalidUrl_ThrowsVaasClientException() {
      * @throws VaasAuthenticationException
      * @throws TimeoutException
      */
-    public function testForUrl_WithNull_ThrowsVaasClientException() {
+    public function testForUrl_WithNull_ThrowsVaasClientException()
+    {
         $vaas = new Vaas($_ENV["VAAS_URL"], $this->_getDebugLogger());
         $this->expectException(\TypeError::class);
         $vaas->Connect($this->getClientCredentialsGrantAuthenticator()->getToken());
@@ -411,7 +411,8 @@ public function testForUrl_WithNull_ThrowsVaasClientException() {
      * @throws VaasAuthenticationException
      * @throws TimeoutException
      */
-    public function testForUrl_WithStatus4xx_ThrowsVaasClientException() {
+    public function testForUrl_WithStatus4xx_ThrowsVaasClientException()
+    {
         $vaas = new Vaas($_ENV["VAAS_URL"], $this->_getDebugLogger());
         $this->expectException(VaasClientException::class);
         $this->expectExceptionMessage("Call failed with status code 404 (Not Found): GET https://upload.production.vaas.gdatasecurity.de/nocontenthere");