diff --git a/.github/workflows/plan.yaml b/.github/workflows/plan.yaml
index e9409c8..9d642c8 100644
--- a/.github/workflows/plan.yaml
+++ b/.github/workflows/plan.yaml
@@ -1,5 +1,8 @@
 name: Prepare Terraform plan
-on: [push]
+on:
+  push:
+    branches:
+      - main
 
 jobs:
   terraform: