diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index d93d8b56..9f41d654 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -5,9 +5,9 @@ name: Build
 
 on:
   push:
-    branches: [ main ]
+    branches: [ main, 3.1.x ]
   pull_request:
-    branches: [ main ]
+    branches: [ main, 3.1.x ]
 
 jobs:
   build: