diff --git a/composer.json b/composer.json
index b381106..d057f7a 100644
--- a/composer.json
+++ b/composer.json
@@ -10,8 +10,7 @@
         }
     ],
     "require": {
-        "laravel/framework": "5.5.* || 5.6.*",
-        "phpstan/phpstan": "^0.9"
+        "laravel/framework": "5.6.*"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.5.2"