diff --git a/composer.json b/composer.json
index 9f2c3a8..e66bee7 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
   ],
   "license": "MIT",
   "require": {
-    "php": ">=8.4",
+    "php": ">=8.5",
     "ext-json": "*",
     "ext-msgpack": "*",
     "start-point/etcd-php": "^1.1",