diff --git a/util/test_relay.sh b/util/test_relay.sh
index 2f1aaba0..1827cc7b 100644
--- a/util/test_relay.sh
+++ b/util/test_relay.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 
 # Only geth right now