diff --git a/README.rst b/README.rst
index 397dbf3..8392954 100644
--- a/README.rst
+++ b/README.rst
@@ -11,22 +11,7 @@ Zun UI
 Manual Installation
 -------------------
 
-Install Horizon according to `Horizon documentation <https://docs.openstack.org/horizon/>`_.
-
-Clone Zun UI from git repository, checkout branch same as Horizon and Zun, and install it::
-
-    git clone https://github.com/openstack/zun-ui
-    git checkout <branch which you want>
-    cd zun-ui
-    pip install .
-
-Enable Zun UI in your Horizon::
-
-    cp zun_ui/enabled/* <path to your horizon>/openstack_dashboard/local/enabled/
-
-Then restart your Horizon.
-
-After restart your Horizon, reload dashboard forcely using [Ctrl + F5] or etc. in your browser.
+Install according to `Zun UI documentation <https://docs.openstack.org/zun-ui/latest/install/index.html>`_.
 
 Enabling in DevStack
 --------------------
diff --git a/doc/source/install/index.rst b/doc/source/install/index.rst
index f45f024..f26bec9 100644
--- a/doc/source/install/index.rst
+++ b/doc/source/install/index.rst
@@ -7,11 +7,17 @@ Manual Installation
 
 Install Horizon according to `Horizon documentation <https://docs.openstack.org/horizon/>`_.
 
+.. note::
+
+  If your Horizon was installed by python3, Zun UI needs to be installed by
+  python3 as well. For example, replace ``pip`` with ``pip3`` and replace
+  ``python`` with ``python3`` for commands below.
+
 Clone Zun UI from git repository, checkout branch same as Horizon and Zun, and install it::
 
     git clone https://github.com/openstack/zun-ui
-    git checkout <branch which you want>
     cd zun-ui
+    git checkout <branch which you want>
     pip install .
 
 Enable Zun UI in your Horizon::