diff --git a/Dockerfile b/Dockerfile
index 40744ae2e..75bd5316b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,4 @@
-# Use Ruby 2.4.9 as base image
-FROM ruby:2.4.9
+FROM ruby:2.6.6
 
 ENV DEBIAN_FRONTEND noninteractive