diff --git a/.github/workflows/cache-purge.yml b/.github/workflows/cache-purge.yml
index 636b490a1..c699f4988 100644
--- a/.github/workflows/cache-purge.yml
+++ b/.github/workflows/cache-purge.yml
@@ -7,6 +7,7 @@ on:
 
 jobs:
   purge-cache:
+    if: github.repository == 'sgl-project/sglang'
     runs-on: self-hosted
 
     steps: