diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e7176c..2ecaafb 100755
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-versions: ['7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
+        php-versions: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         os: [ubuntu-latest, windows-latest]
 
     steps:
diff --git a/ChangeLog.md b/ChangeLog.md
index 21a85ee..c6b26d0 100755
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,6 +3,7 @@ WebSockets change log
 
 ## ?.?.? / ????-??-??
 
+* Dropped support for PHP < 7.4, see xp-framework/rfc#343 - @thekid
 * **Heads up:** The `websocket.Listener`'s *close()* method now has two
   additional parameters, *code* and *reason*, which need to be added to
   implementations.
diff --git a/composer.json b/composer.json
index 7f2688b..9ccb1da 100755
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     "xp-framework/networking": "^10.0 | ^9.3",
     "xp-framework/logging": "^11.0 | ^10.0 | ^9.1",
     "xp-forge/uri": "^2.0 | ^1.4",
-    "php": ">=7.0.0"
+    "php": ">=7.4.0"
   },
   "require-dev" : {
     "xp-framework/test": "^2.0 | ^1.0"
diff --git a/src/test/php/websocket/unittest/ListenersTest.class.php b/src/test/php/websocket/unittest/ListenersTest.class.php
index 19ae681..74f269c 100755
--- a/src/test/php/websocket/unittest/ListenersTest.class.php
+++ b/src/test/php/websocket/unittest/ListenersTest.class.php
@@ -65,10 +65,10 @@ public function listener($path, $expected) {
     $listeners= $this->fixture(function($events) {
       return [
         '/listen' => newinstance(Listener::class, [], [
-          'message' => function($conn, $payload) { return 'listen'; }
+          'message' => fn($conn, $payload) => 'listen',
         ]),
-        '/test'   => function($conn, $payload) { return 'test'; },
-        '/'       => function($conn, $payload) { return 'catch-all'; }
+        '/test'   => fn($conn, $payload) => 'test',
+        '/'       => fn($conn, $payload) => 'catch-all',
       ];
     });
 
@@ -78,7 +78,7 @@ public function listener($path, $expected) {
   #[Test, Values(['/', '/test'])]
   public function catch_all_when_returning_listener($path) {
     $listener= function($conn, $payload) { return 'test'; };
-    $listeners= $this->fixture(function($events) use($listener) { return $listener; });
+    $listeners= $this->fixture(fn($events) => $listener);
 
     Assert::equals('test', $listeners->listener($path)->message(null, 'Test'));
   }
@@ -87,7 +87,7 @@ public function catch_all_when_returning_listener($path) {
   public function no_catch_all() {
     $listeners= $this->fixture(function($events) {
       return [
-        '/test'   => function($conn, $payload) { return 'test'; },
+        '/test' => fn($conn, $payload) => 'test',
       ];
     });
     Assert::null($listeners->listener('/prod'));
diff --git a/src/test/php/websocket/unittest/WebSocketTest.class.php b/src/test/php/websocket/unittest/WebSocketTest.class.php
index 40ca3e3..b0de972 100755
--- a/src/test/php/websocket/unittest/WebSocketTest.class.php
+++ b/src/test/php/websocket/unittest/WebSocketTest.class.php
@@ -17,7 +17,7 @@ private function fixture($payload= '') {
       "\r\n".
       $payload
     ));
-    $fixture->random(function($bytes) { return str_repeat('*', $bytes); });
+    $fixture->random(fn($bytes) => str_repeat('*', $bytes));
     return $fixture;
   }
 
@@ -84,7 +84,7 @@ public function lowercase_headers() {
       "sec-websocket-accept: pT25h6EVFbWDyyinkmTBvzUVxQo=\r\n".
       "\r\n"
     ));
-    $fixture->random(function($bytes) { return str_repeat('*', $bytes); });
+    $fixture->random(fn($bytes) => str_repeat('*', $bytes));
     $fixture->connect();
   }
 
@@ -135,9 +135,7 @@ public function handle_server_error() {
     $fixture= $this->fixture("\x88\x02\x03\xea");
     $fixture->connect();
 
-    Assert::throws(ProtocolException::class, function() use($fixture) {
-      $fixture->receive();
-    });
+    Assert::throws(ProtocolException::class, fn() => $fixture->receive());
     Assert::false($fixture->connected());
   }