From e3fa132f2b6c5adec80fccaaf6460351906c40bb Mon Sep 17 00:00:00 2001
From: Tetsuo Koyama <tkoyama010@gmail.com>
Date: Mon, 24 Feb 2020 16:00:47 +0900
Subject: [PATCH] :arrow_up: doc/usage/installation.rst

---
 doc/usage/installation.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/usage/installation.rst b/doc/usage/installation.rst
index 9fec051bb..15a55c7dd 100644
--- a/doc/usage/installation.rst
+++ b/doc/usage/installation.rst
@@ -192,7 +192,7 @@ __ https://github.com/sphinx-doc/sphinx/archive/master.zip
 docker-sphinx
 -------------
 
-docker-sphinx is Docker images for Sphinx.
+`docker-sphinx <https://hub.docker.com/r/sphinxdoc/sphinx>`_ is Docker images for Sphinx.
 
 It includes images