diff --git a/.github/workflows/sh-prod-canary.yml b/.github/workflows/sh-prod-canary.yml
index bb7c33a..faab68e 100644
--- a/.github/workflows/sh-prod-canary.yml
+++ b/.github/workflows/sh-prod-canary.yml
@@ -1,6 +1,9 @@
 name: sh-prod-canary
 
 on:
+  pull_request_target:
+    branches: [main]
+    types: [closed]
   workflow_dispatch:
 
 concurrency: