diff --git a/composer.json b/composer.json
index 3d9b43f..04dbdd5 100755
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     },
     "require-dev": {
         "atk4/data": "dev-develop",
-        "thecodingmachine/phpstan-safe-rule": "^0.1.3",
+        "thecodingmachine/phpstan-safe-rule": "0.1.3",
         "codacy/coverage": "dev-master@dev",
         "evert/phpdoc-md": "dev-master@dev",
         "friendsofphp/php-cs-fixer": "dev-master@dev",