diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a41e0fd881..807f9afba6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,7 +3,7 @@ on:
   workflow_dispatch:
   schedule:
     # https://crontab.guru/every-day
-    - cron: "/30 * * * *"
+    - cron: "*/30 * * * *"
 jobs:
   writeData:
     runs-on: ubuntu-latest