diff --git a/.github/workflows/update_data.yml b/.github/workflows/update_data.yml
index 84ab932..922ea85 100644
--- a/.github/workflows/update_data.yml
+++ b/.github/workflows/update_data.yml
@@ -1,7 +1,7 @@
 name: Update UN population data
 on:
   schedule:
-    - cron: "7 1 1, 15 1,5,8,10,11 *"
+    - cron: "7 1 1,15 1,5,8,10,11 ?"
   push:
     branches:
       - main