diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c257ff5..4d9ec05 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,7 +3,7 @@ on:
     branches:
       - master
   pull_request_target:
-    types: [opened, closed, reopened]
+    types: [opened, reopened, synchronize]
 
 jobs:
   build: