diff --git a/install.sh b/install.sh
index 7ad975e..197a2d0 100755
--- a/install.sh
+++ b/install.sh
@@ -10,6 +10,17 @@ if [ ! -d $BASEDIR ] ; then
   exit 1
 fi
 
+function prerequisites {
+  if which zsh > /dev/null ; then
+    chsh -s `which zsh`
+    if [ ! -d $HOME/.oh-my-zsh ] ; then
+      git clone https://github.com/robbyrussell/oh-my-zsh.git $HOME/.oh-my-zsh
+    fi
+  else
+    echo "ZSH not found!" > /dev/stderr
+  fi
+}
+
 function install_dir {
   SRCDIR="${1}"
   find ${SRCDIR} \( -name .git -o \
@@ -24,5 +35,6 @@ function install_dir {
     done
 }
 
+prerequisites
 install_dir "${BASEDIR}"
 test -d "${BASEDIR}/private_dotfiles" && install_dir "${BASEDIR}/private_dotfiles"