diff --git a/server/src/main/resources/web/html.ftl b/server/src/main/resources/web/html.ftl
index f4da55b7e..0f80af92e 100644
--- a/server/src/main/resources/web/html.ftl
+++ b/server/src/main/resources/web/html.ftl
@@ -9,7 +9,7 @@
     <#include "*/needFilePasswordHeader.ftl">
 </head>
 <body>
-<iframe src="${pdfUrl}" width="100%" frameborder="0"></iframe>
+<iframe src="${pdfUrl}" width="100%" height="100%" frameborder="0"></iframe>
 </body>
 
 <script type="text/javascript">
