diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 25c02184..1e28a895 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,9 +5,9 @@ name: Java CI with Maven
 
 on:
   push:
-    branches: [ master ]
+    branches: [ 3.3 ]
   pull_request:
-    branches: [ master ]
+    branches: [ 3.3 ]
 
 jobs:
   build: