diff --git a/run_tests.sh b/run_tests.sh
index e359caf..059ac75 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 function usage {
   echo "Usage: $0 [OPTION]..."