diff --git a/composer.json b/composer.json
index 40e3c97..d41db36 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   "require-dev": {
     "friendsofphp/php-cs-fixer": "^2.16.4",
     "phpunit/phpunit": "^8.0 || ^9.0",
-    "phpstan/phpstan": "^0.12"
+    "phpstan/phpstan": "^1.9"
   },
   "config": {
     "preferred-install": "dist",