diff --git a/composer.json b/composer.json
index c52c88bbd..ab724e0b0 100644
--- a/composer.json
+++ b/composer.json
@@ -64,7 +64,7 @@
         "nyholm/psr7-server": "^1.1",
         "phpspec/prophecy": "^1.19",
         "phpspec/prophecy-phpunit": "^2.1",
-        "phpstan/phpstan": "^1 || ^2",
+        "phpstan/phpstan": "^2.1.21",
         "phpunit/phpunit": "^9.6",
         "slim/http": "^1.3",
         "slim/psr7": "^1.6",