diff --git a/composer.json b/composer.json
index b5b28836..dbbc833c 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
     "psr/cache": "^3.0",
     "psr/http-client": "^1.0",
     "psr/simple-cache": "^1.0",
-    "game-worker/kiri-event": "dev-master"
+    "game-worker/kiri-event": "v1.0"
   },
   "autoload": {
     "psr-4": {