diff --git a/Dockerfile b/Dockerfile
index 16c714a7..85c8aa50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,4 +2,5 @@ FROM node:6-alpine
 ENTRYPOINT [ "harp" ]
 WORKDIR /app
 COPY . /opt/harp
+RUN npm config set unsafe-perm true 
 RUN npm install -g /opt/harp