diff --git a/.drone.yml b/.drone.yml
index b976e12..8cc1ee2 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -52,7 +52,7 @@ steps:
   - |
     packer build \
       -on-error=cleanup -timestamp-ui \
-      -parallel=false \
+      -parallel-builds=1 \
       -var vm_name=$DRONE_BUILD_NUMBER-${DRONE_COMMIT_SHA:0:10} \
       -var docker_username=$${DOCKER_USERNAME} \
       -var docker_password=$${DOCKER_PASSWORD} \