diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7147474..c6ecf28 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,8 @@
 name: Calendarium Scraper
 
 on:
+  pull_request:
+    types: [opened, synchronize, reopened]
   schedule:
     # run every 7 days
     - cron: "0 0 * * 0"