diff --git a/Dockerfile b/Dockerfile
index cc75bd6beee..16618a27657 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -58,7 +58,9 @@ RUN npm install -g yarn && \
 COPY Gemfile* package.json yarn.lock /opt/mastodon/
 
 RUN cd /opt/mastodon && \
-	bundle install -j$(nproc) --deployment --without development test && \
+  bundle config set deployment 'true' && \
+  bundle config set without 'development test' && \
+	bundle install -j$(nproc) && \
 	yarn install --pure-lockfile
 
 FROM ubuntu:18.04