diff --git a/Dockerfile b/Dockerfile
index a3960032..21c55c84 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,10 @@ FROM node:12.18-alpine
 COPY . /app
 WORKDIR /app
 
-RUN yarn && \
+RUN yarn --frozen-lockfile && \
   yarn build
 
+# remove development dependencies
+RUN npm prune --production
+
 CMD yarn start