diff --git a/composer.json b/composer.json
index 73ba80c5be..0642255cf3 100644
--- a/composer.json
+++ b/composer.json
@@ -100,7 +100,7 @@
         "pear/pear-core-minimal": "^1.10.10",
         "pear/pear_exception": "^v1.0.2",
         "pear/versioncontrol_git": "dev-master",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^9.5.10",
         "roave/security-advisories": "dev-master",
         "scssphp/scssphp": "~1.0",
         "squizlabs/php_codesniffer": "^3.5",
diff --git a/composer.lock b/composer.lock
index 263738bdd1..9f8facb125 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": "0f0e27f952f489e4c07fdd8a9cfefb62",
+    "content-hash": "595af0d7527be2993060013b968a2c7a",
     "packages": [
         {
             "name": "aws/aws-crt-php",