diff --git a/composer.json b/composer.json
index 9336cbe6..1a47b672 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
   "require-dev": {
     "ext-posix": "*",
     "phpunit/phpunit": "10.5.15",
-    "squizlabs/php_codesniffer": "3.9.0",
+    "squizlabs/php_codesniffer": "3.9.1",
     "mockery/mockery": "1.6.11",
     "jetbrains/phpstorm-stubs": "2023.3",
     "php-coveralls/php-coveralls": "2.7.0",
diff --git a/composer.lock b/composer.lock
index dbb448f0..a8ec561f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f09139b0a1e0a5532db638ce69bb46a3",
+    "content-hash": "dc096d83c085515174239807e4609afc",
     "packages": [
         {
             "name": "amphp/amp",
@@ -4833,16 +4833,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.9.0",
+            "version": "3.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCSStandards/PHP_CodeSniffer.git",
-                "reference": "d63cee4890a8afaf86a22e51ad4d97c91dd4579b"
+                "reference": "267a4405fff1d9c847134db3a3c92f1ab7f77909"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/d63cee4890a8afaf86a22e51ad4d97c91dd4579b",
-                "reference": "d63cee4890a8afaf86a22e51ad4d97c91dd4579b",
+                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/267a4405fff1d9c847134db3a3c92f1ab7f77909",
+                "reference": "267a4405fff1d9c847134db3a3c92f1ab7f77909",
                 "shasum": ""
             },
             "require": {
@@ -4909,7 +4909,7 @@
                     "type": "open_collective"
                 }
             ],
-            "time": "2024-02-16T15:06:51+00:00"
+            "time": "2024-03-31T21:03:09+00:00"
         },
         {
             "name": "symfony/config",