diff --git a/.github/workflows/lychee.yml b/.github/workflows/lychee.yml
index 99f769dc698..5558cb271c8 100644
--- a/.github/workflows/lychee.yml
+++ b/.github/workflows/lychee.yml
@@ -1,11 +1,11 @@
 name: Lychee external linkcheck
 on:
-  schedule:
-    - cron: "18 7 * * 1"  
-  workflow_dispatch: 
+  pull_request:
+    branches:
+      - main
 jobs:
   link-check:
-    runs-on: ubuntu-latest
+    runs-on: tenki-standard-large-plus-16c-32g
 
     steps:
       - name: Checkout repository