diff --git a/Dockerfile b/Dockerfile
index 3ca6f87..17c52ab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,3 +3,4 @@ From ruby:2.5
 RUN apt-get update && apt-get install -y --no-install-recommends nodejs
 
 ENV BUNDLER_VERSION 2.0.1
+RUN gem install bundler -v 2.0.1