diff --git a/2018/ferguson/test.sh b/2018/ferguson/test.sh
index 510672bf4..ce92de269 100755
--- a/2018/ferguson/test.sh
+++ b/2018/ferguson/test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Make sure the program has been compiled
 make clobber all 1> /dev/null|| exit 1