Fix bogus bash binary location
diff --git a/themes/base.theme.bash b/themes/base.theme.bash
index 503fc57..fe112ec 100644
--- a/themes/base.theme.bash
+++ b/themes/base.theme.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 THEME_PROMPT_HOST='\H'
 SCM_THEME_PROMPT_DIRTY=' ✗'