diff --git a/.github/workflows/autoware-base.yaml b/.github/workflows/autoware-base.yaml
index c4a3f2a89a..7b4dada05d 100644
--- a/.github/workflows/autoware-base.yaml
+++ b/.github/workflows/autoware-base.yaml
@@ -1,10 +1,8 @@
 name: autoware-base
 
 on:
-  push:
-    branches:
-      - main
-    tags:
+  schedule:
+    - cron: 0 0 15 * *  # every 15th of the month
   workflow_dispatch:
 
 jobs: