diff --git a/.gitea/workflows/prd-number-check.yml b/.gitea/workflows/prd-number-check.yml
index 1c493b39..306adcf4 100644
--- a/.gitea/workflows/prd-number-check.yml
+++ b/.gitea/workflows/prd-number-check.yml
@@ -3,6 +3,7 @@ name: prd-number-check
 on:
   pull_request:
     types: [opened, reopened, synchronize]
+    branches: [main]
 
 jobs:
   require-numbered-prds: