diff --git a/renovate.json b/renovate.json
index 2aef3c0c..39813f4e 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,7 +1,7 @@
 {
   "extends": [
     "config:js-lib",
-    ":maintainLockFilesWeekly",
+    ":maintainLockFilesMonthly",
     "schedule:nonOfficeHours"
   ],
   "timezone": "Asia/Tokyo"