diff --git a/.github/workflows/build_images.yml b/.github/workflows/build_images.yml
index 8fabdd75..bc64f0ec 100644
--- a/.github/workflows/build_images.yml
+++ b/.github/workflows/build_images.yml
@@ -2,6 +2,7 @@ name: Build docker images
 
 on:
   push:
+    branches: [ main ]
 
 jobs:
   build: