diff --git a/.drone.yml b/.drone.yml
index f294254..717db5a 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -11,6 +11,8 @@ steps:
         path: /var/run/docker.sock
     commands:
       - docker build --no-cache -t autonomic/autonomic.zone:drone .
+    when:
+      branch: master
 
   - name: Deploy Autonomic.zone with Dokku
     image: appleboy/drone-git-push:0.2.0-linux-amd64