diff --git a/tools/install.sh b/tools/install.sh
index 41f83e354..899777bba 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -1,3 +1,5 @@
+#!/bin/zsh
+
 if [ -d ~/.oh-my-zsh ]
 then
   echo "\033[0;33mYou already have Oh My Zsh installed.\033[0m You'll need to remove ~/.oh-my-zsh if you want to install"