diff --git a/test-server/attack.sh b/test-server/attack.sh
index 0186f486..16ed1b57 100755
--- a/test-server/attack.sh
+++ b/test-server/attack.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # attack the test server and try to make it fall over
 #