diff --git a/hlna-git/postinstall.sh b/hlna-git/postinstall.sh
index 60a5f00..8a49e7f 100755
--- a/hlna-git/postinstall.sh
+++ b/hlna-git/postinstall.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 if test -f ~/.zshrc; then
 cd ~/
 echo 'alias hlna="hlna.py"' >> .zshrc