diff --git a/composer.json b/composer.json
index e757cd2..73c2cf2 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
     },
     "require-dev": {
         "beberlei/assert": "~3.0",
-        "phpstan/phpstan": "^0.12.88",
+        "phpstan/phpstan": "^1.4.10",
         "phpunit/phpunit": "^7.5",
         "roave/security-advisories": "dev-master",
         "slevomat/coding-standard": "^6.1",