diff --git a/.github/workflows/build_and_deploy.yml b/.github/workflows/build_and_deploy.yml
index 8a43efac..7737840b 100644
--- a/.github/workflows/build_and_deploy.yml
+++ b/.github/workflows/build_and_deploy.yml
@@ -7,7 +7,7 @@ on:
       - closed
 jobs:
   build_and_deploy:
-    if: github.event.pull_request.merged == true
+    if: github.event.pull_request.merged == true && github.event.pull_request.base.ref == 'master'
     env:
       DOCKER_USER_NAME: ${{ vars.DOCKER_USER_NAME }}
       DOCKER_CONTAINER_NAME: ${{ vars.DOCKER_CONTAINER_NAME }}