diff --git a/Dockerfile b/Dockerfile
index d826df3..5df9f97 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM mhart/alpine-node:9
 WORKDIR /app
 COPY . /app
 
-RUN    rm package-lock.json \
+RUN rm -f package-lock.json \
     ; rm -rf .idea \
     ; rm -rf node_modules \
     ; npm config set registry "https://registry.npm.taobao.org/" \