diff --git a/rootfs/startapp.sh b/rootfs/startapp.sh
index aed2730..8f9b397 100755
--- a/rootfs/startapp.sh
+++ b/rootfs/startapp.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/with-contenv sh
 
 set -e # Exit immediately if a command exits with a non-zero status.
 set -u # Treat unset variables as an error.