diff --git a/hlna-git/postinstall.sh b/hlna-git/postinstall.sh
index c86bab9..a4655d8 100644
--- a/hlna-git/postinstall.sh
+++ b/hlna-git/postinstall.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 if test -e ~/.zshrc; then
 sed -i -e '$aalias hlna="hlna.py"' ~/.zshrc
 sed -i -e '$aalias hlna-bot="hlna-bot.py"' ~/.zshrc