diff --git a/ssl/mkcerts.sh b/ssl/mkcerts.sh
index f0078b6e..115bddbc 100755
--- a/ssl/mkcerts.sh
+++ b/ssl/mkcerts.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 ./mkcert.sh ac
 ./mkcert.sh ac-cisco cisco-ac