diff --git a/README.MD b/README.MD
index 5eb5f13..250ca6e 100644
--- a/README.MD
+++ b/README.MD
@@ -5,6 +5,6 @@ zsh
 --
 To install zsh config, type this:  
 ```sh
-sh -c "${wget -O- https://nakidai.ddns.net/nakidai/dotfiles/raw/branch/master/install_zsh.sh}"
+sh -c "$(wget -O- https://nakidai.ddns.net/nakidai/dotfiles/raw/branch/master/install_zsh.sh)"
 ```
 This script will replace ~/.zshrc and ~/.oh-my-zsh with its own, so be careful