Fix bogus bash binary location
diff --git a/themes/demula/demula.theme.bash b/themes/demula/demula.theme.bash
index bd48e12..1f13f1e 100644
--- a/themes/demula/demula.theme.bash
+++ b/themes/demula/demula.theme.bash
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/usr/bin/env bash 
 
 # Theme inspired on:
 #  - Ronacher's dotfiles (mitsuhikos) - http://github.com/mitsuhiko/dotfiles/tree/master/bash/