diff --git a/composer.json b/composer.json
index ff3c1a72b..797178e3c 100644
--- a/composer.json
+++ b/composer.json
@@ -59,7 +59,7 @@
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     "require-dev": {
         "symfony/stopwatch": "5.4.21",
-        "phpunit/phpunit": "9.6.5",
+        "phpunit/phpunit": "9.6.6",
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     }
 }
\ No newline at end of file
diff --git a/composer.lock b/composer.lock
index 1c6ecc923..46aef5e75 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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     ],
-    "content-hash": "e1c7268bab4af7e0cabe1e5490e58cb0",
+    "content-hash": "9cccf0fb7a4197414ce36c2b8643b100",
     "packages": [
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             "name": "christian-riesen/base32",
@@ -1633,16 +1633,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.6.5",
+            "version": "9.6.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "86e761949019ae83f49240b2f2123fb5ab3b2fc5"
+                "reference": "b65d59a059d3004a040c16a82e07bbdf6cfdd115"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/86e761949019ae83f49240b2f2123fb5ab3b2fc5",
-                "reference": "86e761949019ae83f49240b2f2123fb5ab3b2fc5",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/b65d59a059d3004a040c16a82e07bbdf6cfdd115",
+                "reference": "b65d59a059d3004a040c16a82e07bbdf6cfdd115",
                 "shasum": ""
             },
             "require": {
@@ -1715,7 +1715,8 @@
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             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.5"
+                "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.6"
             },
             "funding": [
                 {
@@ -1731,7 +1732,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-03-09T06:34:10+00:00"
+            "time": "2023-03-27T11:43:46+00:00"
         },
         {
             "name": "roave/security-advisories",