diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 198c0a4..843c6ba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,14 @@
 name: Build CKAN Docker 
 
-on: [push, pull_request]
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the main branch
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs: 
   build: