diff --git a/main.sh b/main.sh
index f489738..3160a4e 100644
--- a/main.sh
+++ b/main.sh
@@ -43,7 +43,7 @@ sudo unzip ./utils/DejaVuSansMono.zip /usr/share/fonts/truetype/DejaVuSansMono/
 # zsh (better shell)
 echo "* add zsh and starship, etc. + nerd font" | tee todo.md -a
 sudo apt-get install -y zsh
-chsh $INSTALL_USER -s /bin/zsh
+sudo chsh $INSTALL_USER -s /bin/zsh
 cp ./utils/dotzshrc "$HOME/.zshrc"
 
 # starship (shell prompt)