diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 1f9d4b0..358ff7b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -2,7 +2,10 @@
 name: Create and publish a Docker image
 
 # Configures this workflow to run every time a change is pushed to the branch called `release`.
-on: [push]
+on:
+  push:
+    branches:
+      - main
 
 # Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
 env: