diff --git a/help/_posts/2019-02-15-rustup.md b/help/_posts/2019-02-15-rustup.md
index b04cf8e..7325be5 100644
--- a/help/_posts/2019-02-15-rustup.md
+++ b/help/_posts/2019-02-15-rustup.md
@@ -32,8 +32,10 @@ $ env RUSTUP_DIST_SERVER=https://{{ site.hostname }}/rustup rustup install night
 
 ```bash
 $ # for bash
+$ echo 'export RUSTUP_UPDATE_ROOT=https://{{ site.hostname }}/rustup/rustup' >> ~/.bash_profile
 $ echo 'export RUSTUP_DIST_SERVER=https://{{ site.hostname }}/rustup' >> ~/.bash_profile
 $ # for fish
+$ echo 'set -x RUSTUP_UPDATE_ROOT https://{{ site.hostname }}/rustup/rustup' >> ~/.config/fish/config.fish
 $ echo 'set -x RUSTUP_DIST_SERVER https://{{ site.hostname }}/rustup' >> ~/.config/fish/config.fish
 ```