diff --git a/.github/workflows/lock.yaml b/.github/workflows/lock.yaml
index c3640358222..e66cb879fa3 100644
--- a/.github/workflows/lock.yaml
+++ b/.github/workflows/lock.yaml
@@ -2,7 +2,7 @@ name: "Lock closed PRs"
 
 on:
     schedule:
-        - cron: "0 3 * * *" # every day at 03:00 UTC
+        - cron: "0 3 * * 0" # every Sunday at 03:00 UTC
     workflow_dispatch:
 
 jobs:
diff --git a/build/target-repository/.github/workflows/lock.yaml b/build/target-repository/.github/workflows/lock.yaml
index a83c461a14d..00da1a3e759 100644
--- a/build/target-repository/.github/workflows/lock.yaml
+++ b/build/target-repository/.github/workflows/lock.yaml
@@ -2,7 +2,7 @@ name: "Lock closed issues"
 
 on:
     schedule:
-        - cron: "0 3 * * *" # every day at 03:00 UTC
+        - cron: "0 3 * * 0" # every Sunday at 03:00 UTC
     workflow_dispatch:
 
 jobs: