diff --git a/docs/Dockerfile b/docs/Dockerfile
index b1fa52c4..79066ed0 100644
--- a/docs/Dockerfile
+++ b/docs/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.1
+FROM ruby:2.5.9
 MAINTAINER mrafayaleem@gmail.com
 
 RUN apt-get clean \