diff --git a/composer.json b/composer.json
index 1a124ca..e9e9556 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require-dev": {
         "adriansuter/php-autoload-override": "^1.0",
         "phpspec/prophecy": "^1.10",
-        "phpstan/phpstan": "^0.12.19",
+        "phpstan/phpstan": "^0.12.23",
         "phpunit/phpunit": "^8.5",
         "squizlabs/php_codesniffer": "^3.5"
     },