diff --git a/README.md b/README.md
index 5a544df..f651e6b 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Add this configuration to your github action
 on:
     # cronjob trigger
   schedule:
-  - cron:  "*/15 * * * *"
+  - cron:  "0 0 1 * *"
   # manual trigger
   workflow_dispatch:
 jobs: