diff --git a/Dockerfile.www-gitlab-com b/Dockerfile.www-gitlab-com
index 9be89f6..308a4a4 100644
--- a/Dockerfile.www-gitlab-com
+++ b/Dockerfile.www-gitlab-com
@@ -1,4 +1,4 @@
-FROM ruby:2.1
+FROM ruby:2.3
 
 ENV PACKAGES="git-core nodejs pandoc texlive-latex-recommended texlive-xetex texlive-fonts-recommended ed" \
 	LC_ALL=en_US.UTF-8