diff --git a/.github/workflows/build-ghcr.yml b/.github/workflows/build-ghcr.yml
index e737008..8a3a376 100644
--- a/.github/workflows/build-ghcr.yml
+++ b/.github/workflows/build-ghcr.yml
@@ -1,7 +1,10 @@
+---
 name: Build for GitHub Container Registry
 
 on:
   push:
+    branches:
+      - "main"
   workflow_dispatch:
 
 jobs:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 94b6001..236c935 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,3 +1,4 @@
+---
 name: Build
 
 on:
diff --git a/.github/workflows/bump-version.yml b/.github/workflows/bump-version.yml
index e191e77..7b98447 100644
--- a/.github/workflows/bump-version.yml
+++ b/.github/workflows/bump-version.yml
@@ -1,3 +1,4 @@
+---
 name: Bump version
 
 on:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b9d0005..f4c51fb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,3 +1,4 @@
+---
 name: Release
 run-name: Release ${{ github.event.inputs.release_type }}