diff --git a/wercker.yml b/wercker.yml
index 4f1916bb..7a10f991 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -44,6 +44,7 @@ deploy-docker-master:
       name: remove dev dependencies
       code: |
         yarn install --production --ignore-scripts --prefer-offline
+        apk del build-base yarn
     - internal/docker-push:
         username: $DOCKER_HUB_USERNAME
         password: $DOCKER_HUB_PASSWORD