diff --git a/composer.json b/composer.json
index 2c36d35..1009b25 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
 	},
 	"require-dev": {
 		"phpstan/phpstan": "^1.10.50",
-		"phpunit/phpunit": "^10.5.3"
+		"phpunit/phpunit": "^10.5.5"
 	},
 	"scripts": {
 		"clean": "@php scripts/clean.php",
diff --git a/composer.lock b/composer.lock
index 6173d7e..5290d0e 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": "9eaaec4047acd067cd35d64c98413f66",
+    "content-hash": "c78315e08bf87e7b5e0a18eec2b8ecbf",
     "packages": [
         {
             "name": "nyholm/psr7",
@@ -857,16 +857,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "10.5.3",
+            "version": "10.5.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "6fce887c71076a73f32fd3e0774a6833fc5c7f19"
+                "reference": "ed21115d505b4b4f7dc7b5651464e19a2c7f7856"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/6fce887c71076a73f32fd3e0774a6833fc5c7f19",
-                "reference": "6fce887c71076a73f32fd3e0774a6833fc5c7f19",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/ed21115d505b4b4f7dc7b5651464e19a2c7f7856",
+                "reference": "ed21115d505b4b4f7dc7b5651464e19a2c7f7856",
                 "shasum": ""
             },
             "require": {
@@ -938,7 +938,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.3"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.5"
             },
             "funding": [
                 {
@@ -954,7 +954,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-12-13T07:25:23+00:00"
+            "time": "2023-12-27T15:13:52+00:00"
         },
         {
             "name": "sebastian/cli-parser",