diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index df928d1..1683971 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -16,9 +16,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
-      # Avoid default day of week because of potential rush.
-      day: "tuesday"
+      interval: "monthly"
       time: "12:00"
       timezone: "Asia/Tokyo"
     groups: