diff --git a/composer.json b/composer.json
index d5017064..7037dcf3 100644
--- a/composer.json
+++ b/composer.json
@@ -38,8 +38,8 @@
   },
 
   "require-dev": {
-    "phpunit/phpunit": "^9",
-    "mockery/mockery": "^1",
+    "phpunit/phpunit": "^9.6",
+    "mockery/mockery": "^1.5.1",
     "squizlabs/php_codesniffer": "^3.6 || 3.x-dev",
     "phpmd/phpmd" : "^2",
     "vimeo/psalm": "^5"