diff --git a/.github/workflows/cache-update.yml b/.github/workflows/cache-update.yml
index 8d0e9962..aadd48a9 100644
--- a/.github/workflows/cache-update.yml
+++ b/.github/workflows/cache-update.yml
@@ -2,7 +2,7 @@ name: cache-update
 
 on:
   schedule:
-    - cron: '*/30 * * * *' # every 30m for testing
+    - cron: '0 0 */3 * *' # every 30m for testing
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs: