diff --git a/composer.json b/composer.json
index a1c9718..ce183be 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "require-dev": {
         "phpunit/phpunit": "^7.5",
         "phpspec/prophecy": "^1.8",
-        "phpstan/phpstan": "^0.11.5",
+        "phpstan/phpstan": "^0.11.5 || ^0.12.0",
         "squizlabs/php_codesniffer": "^3.4.2"
     },
     "autoload": {