diff --git a/debian/helper-script/jd-gui b/debian/helper-script/jd-gui
index c29ce69..e7e920a 100755
--- a/debian/helper-script/jd-gui
+++ b/debian/helper-script/jd-gui
@@ -1,3 +1,5 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
-java -jar /usr/share/jd-gui/jd-gui.jar
+set -e
+
+exec java -jar /usr/share/jd-gui/jd-gui.jar