diff --git a/composer.json b/composer.json
index 1cc1c22..1396b9b 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "ext-igbinary": "*"
   },
   "require-dev": {
-    "phpstan/phpstan": "1.10.43"
+    "phpstan/phpstan": "1.10.66"
   },
   "authors": [
     {