diff --git a/.dockerignore b/.dockerignore
index 830a171e1..826cdd4c1 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -10,9 +10,7 @@ docs
 features
 log
 node_modules
-package.json
 script
 spec
 test
 tmp
-yarn.lock
diff --git a/Dockerfile b/Dockerfile
index 9d0ad85fe..fb9302586 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,8 @@ ENV GOVUK_NOTIFY_API_KEY=unused
 WORKDIR $APP_HOME
 COPY Gemfile* .ruby-version ./
 RUN bundle install
+COPY package.json yarn.lock ./
+RUN yarn install --production
 COPY . .
 RUN bootsnap precompile --gemfile .
 RUN rails assets:precompile && rm -fr log