diff --git a/Dockerfile b/Dockerfile
index c394104a2..b2d4b062a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -88,6 +88,7 @@ ADD package.json package.json
 ADD tsconfig.json tsconfig.json
 ADD webpack.config.js webpack.config.js
 ADD typings.json typings.json
+ADD yarn.lock yarn.lock
 RUN yarn install --ignore-engines
 
 # Add static files
@@ -162,6 +163,7 @@ RUN rm -rf /usr/local/lib/node_modules
 RUN rm -rf /root/node_modules
 RUN rm -rf /node_modules
 RUN rm -rf /grunt
+RUN rm package.json yarn.lock
 
 # Run the tests
 ENV RUN_ACI_TESTS False