diff --git a/deploy/kong.sh b/deploy/kong.sh
index 9d1f40a..dce9209 100755
--- a/deploy/kong.sh
+++ b/deploy/kong.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env sh
 # Note that ssl plugin should be available on Kong instance
 # The hook will match cdomain to request_host, in case of multiple domain it will always take the first
 # one (acme.sh behaviour).