Fix bogus bash binary location
diff --git a/themes/doubletime_multiline/doubletime_multiline.theme.bash b/themes/doubletime_multiline/doubletime_multiline.theme.bash
index b2215a8..d431657 100644
--- a/themes/doubletime_multiline/doubletime_multiline.theme.bash
+++ b/themes/doubletime_multiline/doubletime_multiline.theme.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 source "$BASH_IT/themes/doubletime/doubletime.theme.bash"