diff --git a/.github/workflows/package_check.yml b/.github/workflows/package_check.yml
index 8c3b089..4de9bf5 100644
--- a/.github/workflows/package_check.yml
+++ b/.github/workflows/package_check.yml
@@ -1,5 +1,10 @@
 name: R Build and Checks
-on: [push, pull_request]
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron "42 3 21 * *"
 
 jobs:
   R-CMD-check: