diff --git a/composer.json b/composer.json
index 294e3ef..fc6c43e 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     "ergebnis/license": "^2.1.0",
     "ergebnis/php-cs-fixer-config": "~5.3.0",
     "infection/infection": "~0.26.18",
-    "phpunit/phpunit": "^9.6.0",
+    "phpunit/phpunit": "^9.6.3",
     "psalm/plugin-phpunit": "~0.18.4",
     "vimeo/psalm": "^5.6.0"
   },
diff --git a/composer.lock b/composer.lock
index fb271c2..5e7b178 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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         "This file is @generated automatically"
     ],
-    "content-hash": "e8bbdd31659df1ec174caf6825a7fcaf",
+    "content-hash": "ef7a948df0dd795a30771758d0d23a92",
     "packages": [
         {
             "name": "psr/clock",
@@ -2814,16 +2814,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.6.0",
+            "version": "9.6.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "70fc8be1d0b9fad56a199a4df5f9cfabfc246f84"
+                "reference": "e7b1615e3e887d6c719121c6d4a44b0ab9645555"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/70fc8be1d0b9fad56a199a4df5f9cfabfc246f84",
-                "reference": "70fc8be1d0b9fad56a199a4df5f9cfabfc246f84",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/e7b1615e3e887d6c719121c6d4a44b0ab9645555",
+                "reference": "e7b1615e3e887d6c719121c6d4a44b0ab9645555",
                 "shasum": ""
             },
             "require": {
@@ -2896,7 +2896,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.0"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.3"
             },
             "funding": [
                 {
@@ -2912,7 +2912,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-02-03T07:32:24+00:00"
+            "time": "2023-02-04T13:37:15+00:00"
         },
         {
             "name": "psalm/plugin-phpunit",