diff --git a/index.html b/index.html
index ed033f2..17bd21d 100644
--- a/index.html
+++ b/index.html
@@ -38,7 +38,7 @@
 	</style>
 </head>
 <body>
-	<form id="previewform" onsubmit="location.href='/?'+this.file.value;return false">
+	<form id="previewform" onsubmit="location.href='/?url='+this.file.value;return false">
 		<h1>Git-Forge HTML Preview</h1>
 		<p>
 			Enter URL of the HTML file to preview:
