diff --git a/container/Dockerfile b/container/Dockerfile
index 5dde2fcbc..6bfd54f4a 100644
--- a/container/Dockerfile
+++ b/container/Dockerfile
@@ -6,8 +6,8 @@ SHELL ["bash", "-c"]
 COPY Gemfile* package.json yarn.lock /opt/mastodon/
 
 RUN cd /opt/mastodon && \
-        bundle config set deployment 'true' \
-	bundle install -j$(nproc) --without development test && \
+        bundle config set deployment 'true' && \
+	bundle install --without development test --with production && \
 	yarn install --pure-lockfile
 
 FROM amd64/ubuntu:18.04