diff --git a/.github/workflows/cleanup-stacks.yml b/.github/workflows/cleanup-stacks.yml
index acb26932..c443838f 100644
--- a/.github/workflows/cleanup-stacks.yml
+++ b/.github/workflows/cleanup-stacks.yml
@@ -2,7 +2,7 @@ name: cleanup-stacks
 
 on:
   schedule:
-    - cron: "0 0,12 * * *"
+    - cron: "0 */3 * * *"
   workflow_dispatch:
 
 jobs: