diff --git a/html5/verto/video_demo/verto.js b/html5/verto/video_demo/verto.js
index 9ce96b0c3e..dc9b7f1dd1 100644
--- a/html5/verto/video_demo/verto.js
+++ b/html5/verto/video_demo/verto.js
@@ -95,7 +95,7 @@ function check_vid_res()
     $("#webcam").height(vid_height);
 
     if (verto) {
-	verto.videoParams({"minWidth": vid_width, "minHeight": vid_height, "minFrameRate": 30});
+	verto.videoParams({"minWidth": vid_width, "minHeight": vid_height, "maxWidth": vid_width, "maxHeight": vid_height, "minFrameRate": 30});
     }
 
 }
@@ -555,6 +555,8 @@ function init() {
         videoParams: {
             "minWidth": vid_width,
             "minHeight": vid_height,
+            "maxWidth": vid_width,
+            "maxHeight": vid_height,
 	    "minFrameRate": 30
         },
 	audioParams: {