diff --git a/file/Makefile b/file/Makefile
index 6b8ef5f3b..1af12f79f 100644
--- a/file/Makefile
+++ b/file/Makefile
@@ -1,3 +1,4 @@
-file.jar:		FileManager.java Util.java
+file.jar:		FileManager.java Util.java manifest.txt
 			CLASSPATH=plugin.jar:. javac -target 1.2 -source 1.2 *.java
-			jar cf file.jar *.class
+			jar cfm file.jar manifest.txt *.class
+			jarsigner -keystore ~/webmin-keystore file.jar me
diff --git a/file/index.cgi b/file/index.cgi
index 5c4ebed41..79ae13bb7 100755
--- a/file/index.cgi
+++ b/file/index.cgi
@@ -93,6 +93,7 @@ open("edit_html.cgi?file="+escape(file)+"&dir="+escape(dir)+"&trust=$trust", "ht
 </script>
 
 <applet code=FileManager name=FileManager archive=file.jar width=$w% height=$h% MAYSCRIPT>
+<param name=permissions value="sandbox">
 <param name=root value="$root">
 <param name=noroot value="$noroot">
 <param name=follow value="$follow">