diff --git a/Dockerfile b/Dockerfile
index 6ead945..2015581 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,6 @@
 FROM node:8-alpine
 RUN apk add --no-cache libc6-compat
+RUN apk add git && yarn
 WORKDIR /app
 COPY package.json /app
 RUN yarn install --frozen-lockfile