diff --git a/setup.sh b/setup.sh
index ea9f41a..ffbec44 100644
--- a/setup.sh
+++ b/setup.sh
@@ -1,11 +1,11 @@
 #!/bin/bash
 
-INSTALL_DIR='$HOME/.installs'
-TMUX_DIR='$INSTALL_DIR/tmux-config'
+INSTALL_DIR="${HOME}/.installs"
+TMUX_DIR="${INSTALL_DIR}/tmux-config"
 
 mkdir -p $INSTALL_DIR
 
-echo 'installing tmux-config in $TMUX_DIR'
+echo "installing tmux-config in ${TMUX_DIR}"
 git clone git@github.com:chanwutk/tmux-config.git $TMUX_DIR
 
 ln -s -f $TMUX_DIR/.tmux.conf ~/.tmux.conf