diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index e064c3e..85f0086 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -1,5 +1,8 @@
 name: Build Docker containers
-on: [push]
+on:
+  push:
+    branches:
+      - master
 
 jobs:
   Build: