diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bbee369..7e6684b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,5 +1,8 @@
 name: Build
 on:
+  pull_request: 
+    branches: [main]
+    paths: ["**.bs"]
   push:
     branches: [main]
     paths: ["**.bs"]