diff --git a/.github/workflows/build-containers.yml b/.github/workflows/build-containers.yml
index 3dda368..c688a5f 100644
--- a/.github/workflows/build-containers.yml
+++ b/.github/workflows/build-containers.yml
@@ -1,5 +1,8 @@
 name: Build Docker containers
-on: [push]
+on:
+  push:
+    branches:
+      - master
 jobs:
   build-client:
     name: Build and push client/ Docker container