diff --git a/composer.json b/composer.json
index 7b07832..461646c 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "phan/phan": "^5.1.0",
-        "phpstan/phpstan": "^0.12.58",
+        "phpstan/phpstan": "~0.12.58",
         "phpstan/phpstan-strict-rules": "^0.12.4",
         "phpunit/phpunit": "^7.0",
         "psalm/plugin-phpunit": "^0.16.1",