diff --git a/composer.json b/composer.json
index f5ef898..7ad30e2 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
   "require-dev": {
     "adriansuter/php-autoload-override": "^1.2",
     "phpspec/prophecy": "^1.12",
-    "phpstan/phpstan": "^0.12.58",
+    "phpstan/phpstan": "^0.12.64",
     "phpunit/phpunit": "^8.5",
     "squizlabs/php_codesniffer": "^3.5"
   },