diff --git a/.github/PULL_REQUEST_TEMPLATE/pull_request_template.md b/.github/PULL_REQUEST_TEMPLATE/pull_request_template.md
new file mode 100644
index 0000000..7746407
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE/pull_request_template.md
@@ -0,0 +1,11 @@
+---
+name: Pull Request
+about: Pull Request
+title: ''
+labels: ''
+assignees: ''
+---
+
+Thanks for contributing!
+
+Before you create a Pull Request, make sure to read the [Contributing](../../docs/Contributing.md) specification.
diff --git a/.github/workflows/acceptance.yml b/.github/workflows/acceptance.yml
index 0695c98..03cef93 100644
--- a/.github/workflows/acceptance.yml
+++ b/.github/workflows/acceptance.yml
@@ -7,7 +7,7 @@ jobs:
   test:
     strategy:
       matrix:
-        php-versions: ["8.0", "8.1", "8.2", "8.3", "8.4"]
+        php-versions: ["8.1", "8.2", "8.3", "8.4"]
     runs-on: ubuntu-latest
     name: Unit test
     steps:
@@ -43,7 +43,7 @@ jobs:
     - name: Set up PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: "8.2"
+        php-version: "8.3"
         coverage: none
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -70,7 +70,7 @@ jobs:
     - name: Set up PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: "8.2"
+        php-version: "8.3"
         coverage: xdebug
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/composer.json b/composer.json
index fcd8163..8f4d805 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         }
     },
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "phrity/net-uri": "^1.2",
         "phrity/net-stream": "^1.3",
         "phrity/util-errorhandler": "^1.0",
diff --git a/docs/Changelog.md b/docs/Changelog.md
index f4ce971..7110164 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -4,11 +4,12 @@
 
 ## `v2.2`
 
- > PHP version `^8.0`
+ > PHP version `^8.1`
 
 ### `2.2.0`
 
  * Documentation overview (@sirn-se)
+ * Removed PHP `8.0` support (@sirn-se)
 
 ## `v2.1`
 
diff --git a/docs/Contributing.md b/docs/Contributing.md
index 1dc05c7..34c4ec5 100644
--- a/docs/Contributing.md
+++ b/docs/Contributing.md
@@ -16,7 +16,7 @@ Base your patch on corresponding version branch, and target that version branch
 
 | Version | Branch | PHP | Status |
 | --- | --- | --- | --- |
-| [`2.2`](https://github.com/sirn-se/websocket-php/tree/2.2.0) | `v2.2-main` | `^8.0` | Future version |
+| [`2.2`](https://github.com/sirn-se/websocket-php/tree/2.2.0) | `v2.2-main` | `^8.1` | Future version |
 | [`2.1`](https://github.com/sirn-se/websocket-php/tree/2.1.0) | `v2.1-main` | `^8.0` | Current version |
 | [`2.0`](https://github.com/sirn-se/websocket-php/tree/2.0.0) | `v2.0-main` | `^8.0` | Bug fixes only |
 | [`1.7`](https://github.com/sirn-se/websocket-php/tree/1.7.0) | `v1.7-master` | `^7.4\|^8.0` | Bug fixes only |
diff --git a/examples/echoserver.php b/examples/echoserver.php
index 99db3ac..922f37b 100644
--- a/examples/echoserver.php
+++ b/examples/echoserver.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
+ */
+
 /**
  * This file is used for the tests, but can also serve as an example of a WebSocket\Server.
  * Run in console: php examples/echoserver.php
diff --git a/examples/random_client.php b/examples/random_client.php
index da51fe4..bae7fbd 100644
--- a/examples/random_client.php
+++ b/examples/random_client.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
+ */
+
 /**
  * Websocket client that read/write random data.
  * Run in console: php examples/random_client.php
diff --git a/examples/random_server.php b/examples/random_server.php
index 34999e3..79fd591 100644
--- a/examples/random_server.php
+++ b/examples/random_server.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
+ */
+
 /**
  * Websocket server that read/write random data.
  * Run in console: php examples/random_server.php
diff --git a/examples/send.php b/examples/send.php
index e670fc9..3e21009 100644
--- a/examples/send.php
+++ b/examples/send.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
+ */
+
 /**
  * Simple send & receive client for test purpose.
  * Run in console: php examples/send.php <options> <message>
diff --git a/src/Client.php b/src/Client.php
index 65df2ec..7ee1116 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket;
diff --git a/src/Connection.php b/src/Connection.php
index f495811..61525c3 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket;
@@ -349,7 +347,7 @@ public function getHandshakeResponse(): Response|null
 
     /* ---------- Internal helper methods -------------------------------------------------------------------------- */
 
-    protected function throwException(Throwable $e): void
+    protected function throwException(Throwable $e): never
     {
         // Internal exceptions are handled and re-thrown
         if ($e instanceof Exception) {
diff --git a/src/Exception/BadOpcodeException.php b/src/Exception/BadOpcodeException.php
index 08dad4a..05cfeac 100644
--- a/src/Exception/BadOpcodeException.php
+++ b/src/Exception/BadOpcodeException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/BadUriException.php b/src/Exception/BadUriException.php
index 386a092..2d6ee0b 100644
--- a/src/Exception/BadUriException.php
+++ b/src/Exception/BadUriException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ClientException.php b/src/Exception/ClientException.php
index 9d32767..500dd65 100644
--- a/src/Exception/ClientException.php
+++ b/src/Exception/ClientException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/CloseException.php b/src/Exception/CloseException.php
index 5d8b0e6..de7f9fb 100644
--- a/src/Exception/CloseException.php
+++ b/src/Exception/CloseException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ConnectionClosedException.php b/src/Exception/ConnectionClosedException.php
index 622939f..89c61f7 100644
--- a/src/Exception/ConnectionClosedException.php
+++ b/src/Exception/ConnectionClosedException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ConnectionFailureException.php b/src/Exception/ConnectionFailureException.php
index 8969a9a..3dcdcfb 100644
--- a/src/Exception/ConnectionFailureException.php
+++ b/src/Exception/ConnectionFailureException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ConnectionLevelInterface.php b/src/Exception/ConnectionLevelInterface.php
index dbdaab3..9f3e32d 100644
--- a/src/Exception/ConnectionLevelInterface.php
+++ b/src/Exception/ConnectionLevelInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ConnectionTimeoutException.php b/src/Exception/ConnectionTimeoutException.php
index 077c932..5c4b856 100644
--- a/src/Exception/ConnectionTimeoutException.php
+++ b/src/Exception/ConnectionTimeoutException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/Exception.php b/src/Exception/Exception.php
index a7058f6..0c27b99 100644
--- a/src/Exception/Exception.php
+++ b/src/Exception/Exception.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/HandshakeException.php b/src/Exception/HandshakeException.php
index 92c4511..a638473 100644
--- a/src/Exception/HandshakeException.php
+++ b/src/Exception/HandshakeException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/MessageLevelInterface.php b/src/Exception/MessageLevelInterface.php
index 14803dc..08ad207 100644
--- a/src/Exception/MessageLevelInterface.php
+++ b/src/Exception/MessageLevelInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Exception/ServerException.php b/src/Exception/ServerException.php
index df7d75a..5f20edf 100644
--- a/src/Exception/ServerException.php
+++ b/src/Exception/ServerException.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Exception;
diff --git a/src/Frame/Frame.php b/src/Frame/Frame.php
index 4a4dd9c..49da3ea 100644
--- a/src/Frame/Frame.php
+++ b/src/Frame/Frame.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Frame;
diff --git a/src/Frame/FrameHandler.php b/src/Frame/FrameHandler.php
index 01f5a7b..5d23713 100644
--- a/src/Frame/FrameHandler.php
+++ b/src/Frame/FrameHandler.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Frame;
diff --git a/src/Http/HttpHandler.php b/src/Http/HttpHandler.php
index 745a33a..4594dd0 100644
--- a/src/Http/HttpHandler.php
+++ b/src/Http/HttpHandler.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Http;
diff --git a/src/Http/Message.php b/src/Http/Message.php
index 1a4ccca..cd20e3f 100644
--- a/src/Http/Message.php
+++ b/src/Http/Message.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Http;
diff --git a/src/Http/Request.php b/src/Http/Request.php
index 354d593..01cd465 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Http;
diff --git a/src/Http/Response.php b/src/Http/Response.php
index ec20210..743d4ca 100644
--- a/src/Http/Response.php
+++ b/src/Http/Response.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Http;
diff --git a/src/Http/ServerRequest.php b/src/Http/ServerRequest.php
index d9dbae3..b0734d8 100644
--- a/src/Http/ServerRequest.php
+++ b/src/Http/ServerRequest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Http;
diff --git a/src/Message/Binary.php b/src/Message/Binary.php
index 3325cd0..be4db14 100644
--- a/src/Message/Binary.php
+++ b/src/Message/Binary.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/Close.php b/src/Message/Close.php
index 5550259..70f7189 100644
--- a/src/Message/Close.php
+++ b/src/Message/Close.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/Message.php b/src/Message/Message.php
index df847df..8046f4f 100644
--- a/src/Message/Message.php
+++ b/src/Message/Message.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/MessageHandler.php b/src/Message/MessageHandler.php
index ecf7598..addd5f4 100644
--- a/src/Message/MessageHandler.php
+++ b/src/Message/MessageHandler.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/Ping.php b/src/Message/Ping.php
index ecb932a..1d1c016 100644
--- a/src/Message/Ping.php
+++ b/src/Message/Ping.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/Pong.php b/src/Message/Pong.php
index 7b3e5a8..e168237 100644
--- a/src/Message/Pong.php
+++ b/src/Message/Pong.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Message/Text.php b/src/Message/Text.php
index f468767..b717cd2 100644
--- a/src/Message/Text.php
+++ b/src/Message/Text.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Message;
diff --git a/src/Middleware/Callback.php b/src/Middleware/Callback.php
index 2c65ec4..49054a6 100644
--- a/src/Middleware/Callback.php
+++ b/src/Middleware/Callback.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/CloseHandler.php b/src/Middleware/CloseHandler.php
index f0d6af9..f20c850 100644
--- a/src/Middleware/CloseHandler.php
+++ b/src/Middleware/CloseHandler.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/MiddlewareHandler.php b/src/Middleware/MiddlewareHandler.php
index ba92571..63aa874 100644
--- a/src/Middleware/MiddlewareHandler.php
+++ b/src/Middleware/MiddlewareHandler.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/MiddlewareInterface.php b/src/Middleware/MiddlewareInterface.php
index 62773e1..78f7a82 100644
--- a/src/Middleware/MiddlewareInterface.php
+++ b/src/Middleware/MiddlewareInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/PingInterval.php b/src/Middleware/PingInterval.php
index 22439f5..38b1d93 100644
--- a/src/Middleware/PingInterval.php
+++ b/src/Middleware/PingInterval.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/PingResponder.php b/src/Middleware/PingResponder.php
index f8522f4..a61961d 100644
--- a/src/Middleware/PingResponder.php
+++ b/src/Middleware/PingResponder.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessHttpIncomingInterface.php b/src/Middleware/ProcessHttpIncomingInterface.php
index d854b49..e287528 100644
--- a/src/Middleware/ProcessHttpIncomingInterface.php
+++ b/src/Middleware/ProcessHttpIncomingInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessHttpOutgoingInterface.php b/src/Middleware/ProcessHttpOutgoingInterface.php
index 646dfd6..85762d7 100644
--- a/src/Middleware/ProcessHttpOutgoingInterface.php
+++ b/src/Middleware/ProcessHttpOutgoingInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessHttpStack.php b/src/Middleware/ProcessHttpStack.php
index e37387f..e265ed6 100644
--- a/src/Middleware/ProcessHttpStack.php
+++ b/src/Middleware/ProcessHttpStack.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessIncomingInterface.php b/src/Middleware/ProcessIncomingInterface.php
index b9442bf..715ac95 100644
--- a/src/Middleware/ProcessIncomingInterface.php
+++ b/src/Middleware/ProcessIncomingInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessOutgoingInterface.php b/src/Middleware/ProcessOutgoingInterface.php
index 32b733f..d51f809 100644
--- a/src/Middleware/ProcessOutgoingInterface.php
+++ b/src/Middleware/ProcessOutgoingInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessStack.php b/src/Middleware/ProcessStack.php
index bb7e803..f4f0626 100644
--- a/src/Middleware/ProcessStack.php
+++ b/src/Middleware/ProcessStack.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessTickInterface.php b/src/Middleware/ProcessTickInterface.php
index cfa3fec..8f18421 100644
--- a/src/Middleware/ProcessTickInterface.php
+++ b/src/Middleware/ProcessTickInterface.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Middleware/ProcessTickStack.php b/src/Middleware/ProcessTickStack.php
index 71f7413..014e5ac 100644
--- a/src/Middleware/ProcessTickStack.php
+++ b/src/Middleware/ProcessTickStack.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Middleware;
diff --git a/src/Server.php b/src/Server.php
index 5d4276a..94f2c38 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket;
diff --git a/src/Trait/ListenerTrait.php b/src/Trait/ListenerTrait.php
index 89c4469..6de58b2 100644
--- a/src/Trait/ListenerTrait.php
+++ b/src/Trait/ListenerTrait.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Trait;
diff --git a/src/Trait/OpcodeTrait.php b/src/Trait/OpcodeTrait.php
index 62e9317..c54dd67 100644
--- a/src/Trait/OpcodeTrait.php
+++ b/src/Trait/OpcodeTrait.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Trait;
diff --git a/src/Trait/SendMethodsTrait.php b/src/Trait/SendMethodsTrait.php
index ed55693..75e93bd 100644
--- a/src/Trait/SendMethodsTrait.php
+++ b/src/Trait/SendMethodsTrait.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Trait;
diff --git a/src/Trait/StringableTrait.php b/src/Trait/StringableTrait.php
index df6b3c7..373419c 100644
--- a/src/Trait/StringableTrait.php
+++ b/src/Trait/StringableTrait.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 namespace WebSocket\Trait;
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 675a2a8..3ea464f 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
+ */
+
 namespace WebSocket;
 
 require dirname(__DIR__) . '/vendor/autoload.php';
diff --git a/tests/mock/EchoLog.php b/tests/mock/EchoLog.php
index 8f62f86..09e677a 100644
--- a/tests/mock/EchoLog.php
+++ b/tests/mock/EchoLog.php
@@ -1,11 +1,15 @@
 <?php
 
 /**
- * Simple echo logger (only available when running in dev environment)
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
  */
 
 namespace WebSocket\Test;
 
+/**
+ * Simple echo logger (only available when running in dev environment)
+ */
 class EchoLog implements \Psr\Log\LoggerInterface
 {
     use \Psr\Log\LoggerTrait;
diff --git a/tests/mock/MockStreamTrait.php b/tests/mock/MockStreamTrait.php
index 6f385ba..6e9a9d7 100644
--- a/tests/mock/MockStreamTrait.php
+++ b/tests/mock/MockStreamTrait.php
@@ -1,7 +1,8 @@
 <?php
 
 /**
- * This class is used by phpunit tests to mock and track various socket/stream calls.
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
  */
 
 namespace WebSocket\Test;
@@ -9,6 +10,9 @@
 use Phrity\Net\Mock\StreamCollection;
 use Phrity\Net\Mock\Stack\StackItem;
 
+/**
+ * This trait is used by phpunit tests to mock and track various socket/stream calls.
+ */
 trait MockStreamTrait
 {
     private $stack = [];
diff --git a/tests/mock/MockUri.php b/tests/mock/MockUri.php
index 6be6a89..1c174df 100644
--- a/tests/mock/MockUri.php
+++ b/tests/mock/MockUri.php
@@ -1,13 +1,17 @@
 <?php
 
 /**
- * This class is used by phpunit tests to mock and track various socket/stream calls.
+ * Copyright (C) 2014-2024 Textalk and contributors.
+ * This file is part of Websocket PHP and is free software under the ISC License.
  */
 
 namespace WebSocket\Test;
 
 use Psr\Http\Message\UriInterface;
 
+/**
+ * This class is used by phpunit tests to mock and track various socket/stream calls.
+ */
 class MockUri implements UriInterface
 {
     public function __toString(): string
diff --git a/tests/suites/client/ClientErrorTest.php b/tests/suites/client/ClientErrorTest.php
index 023a1cb..b648aa7 100644
--- a/tests/suites/client/ClientErrorTest.php
+++ b/tests/suites/client/ClientErrorTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/client/ClientTest.php b/tests/suites/client/ClientTest.php
index b98a7ca..0968651 100644
--- a/tests/suites/client/ClientTest.php
+++ b/tests/suites/client/ClientTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/client/ConfigErrorTest.php b/tests/suites/client/ConfigErrorTest.php
index e5b5b47..5032b9d 100644
--- a/tests/suites/client/ConfigErrorTest.php
+++ b/tests/suites/client/ConfigErrorTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/client/ConfigTest.php b/tests/suites/client/ConfigTest.php
index 23ac0b4..01ab0b1 100644
--- a/tests/suites/client/ConfigTest.php
+++ b/tests/suites/client/ConfigTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/client/HandshakeTest.php b/tests/suites/client/HandshakeTest.php
index cc94ec4..e53e795 100644
--- a/tests/suites/client/HandshakeTest.php
+++ b/tests/suites/client/HandshakeTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/connection/ConnectionTest.php b/tests/suites/connection/ConnectionTest.php
index 44516b4..8d4df59 100644
--- a/tests/suites/connection/ConnectionTest.php
+++ b/tests/suites/connection/ConnectionTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/connection/ExceptionTest.php b/tests/suites/connection/ExceptionTest.php
index d30e0d4..fc435c4 100644
--- a/tests/suites/connection/ExceptionTest.php
+++ b/tests/suites/connection/ExceptionTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/frame/FrameHandlerTest.php b/tests/suites/frame/FrameHandlerTest.php
index ba1749c..1879b0b 100644
--- a/tests/suites/frame/FrameHandlerTest.php
+++ b/tests/suites/frame/FrameHandlerTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/frame/FrameTest.php b/tests/suites/frame/FrameTest.php
index 4b08d9c..87b9795 100644
--- a/tests/suites/frame/FrameTest.php
+++ b/tests/suites/frame/FrameTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/http/HttpHandlerTest.php b/tests/suites/http/HttpHandlerTest.php
index 5074b68..03ce93e 100644
--- a/tests/suites/http/HttpHandlerTest.php
+++ b/tests/suites/http/HttpHandlerTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/http/RequestTest.php b/tests/suites/http/RequestTest.php
index ac6b2b2..c3420e6 100644
--- a/tests/suites/http/RequestTest.php
+++ b/tests/suites/http/RequestTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/http/ResponseTest.php b/tests/suites/http/ResponseTest.php
index 07d70c8..3e1e29c 100644
--- a/tests/suites/http/ResponseTest.php
+++ b/tests/suites/http/ResponseTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/http/ServerRequestTest.php b/tests/suites/http/ServerRequestTest.php
index c1ce62f..8172c18 100644
--- a/tests/suites/http/ServerRequestTest.php
+++ b/tests/suites/http/ServerRequestTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/BinaryTest.php b/tests/suites/message/BinaryTest.php
index 45cfd82..d1d2484 100644
--- a/tests/suites/message/BinaryTest.php
+++ b/tests/suites/message/BinaryTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/CloseTest.php b/tests/suites/message/CloseTest.php
index ccb25e6..6e7c881 100644
--- a/tests/suites/message/CloseTest.php
+++ b/tests/suites/message/CloseTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/MessageHandlerTest.php b/tests/suites/message/MessageHandlerTest.php
index 1ac6f2d..67bca34 100644
--- a/tests/suites/message/MessageHandlerTest.php
+++ b/tests/suites/message/MessageHandlerTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/PingTest.php b/tests/suites/message/PingTest.php
index 79c9c46..2b6b75b 100644
--- a/tests/suites/message/PingTest.php
+++ b/tests/suites/message/PingTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/PongTest.php b/tests/suites/message/PongTest.php
index a27ba64..ec7b97d 100644
--- a/tests/suites/message/PongTest.php
+++ b/tests/suites/message/PongTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/message/TextTest.php b/tests/suites/message/TextTest.php
index 3211550..5e3a2e1 100644
--- a/tests/suites/message/TextTest.php
+++ b/tests/suites/message/TextTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/middleware/CallbackTest.php b/tests/suites/middleware/CallbackTest.php
index ec02b0c..75d9d56 100644
--- a/tests/suites/middleware/CallbackTest.php
+++ b/tests/suites/middleware/CallbackTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/middleware/CloseHandlerTest.php b/tests/suites/middleware/CloseHandlerTest.php
index 16103b3..982ae1c 100644
--- a/tests/suites/middleware/CloseHandlerTest.php
+++ b/tests/suites/middleware/CloseHandlerTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/middleware/PingIntervalTest.php b/tests/suites/middleware/PingIntervalTest.php
index 717e787..86bf4e8 100644
--- a/tests/suites/middleware/PingIntervalTest.php
+++ b/tests/suites/middleware/PingIntervalTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/middleware/PingResponderTest.php b/tests/suites/middleware/PingResponderTest.php
index bb9e61b..e1d150c 100644
--- a/tests/suites/middleware/PingResponderTest.php
+++ b/tests/suites/middleware/PingResponderTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/middleware/ProcessStackTest.php b/tests/suites/middleware/ProcessStackTest.php
index 864433f..299c102 100644
--- a/tests/suites/middleware/ProcessStackTest.php
+++ b/tests/suites/middleware/ProcessStackTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/server/ConfigErrorTest.php b/tests/suites/server/ConfigErrorTest.php
index 08d78e3..70e4e48 100644
--- a/tests/suites/server/ConfigErrorTest.php
+++ b/tests/suites/server/ConfigErrorTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/server/ConfigTest.php b/tests/suites/server/ConfigTest.php
index ad6719c..05a2ad2 100644
--- a/tests/suites/server/ConfigTest.php
+++ b/tests/suites/server/ConfigTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/server/HandshakeTest.php b/tests/suites/server/HandshakeTest.php
index bc99929..49ebd36 100644
--- a/tests/suites/server/HandshakeTest.php
+++ b/tests/suites/server/HandshakeTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);
diff --git a/tests/suites/server/ServerTest.php b/tests/suites/server/ServerTest.php
index 3032057..ff7cef3 100644
--- a/tests/suites/server/ServerTest.php
+++ b/tests/suites/server/ServerTest.php
@@ -1,10 +1,8 @@
 <?php
 
 /**
- * Copyright (C) 2014-2023 Textalk and contributors.
- *
+ * Copyright (C) 2014-2024 Textalk and contributors.
  * This file is part of Websocket PHP and is free software under the ISC License.
- * License text: https://raw.githubusercontent.com/sirn-se/websocket-php/master/COPYING.md
  */
 
 declare(strict_types=1);