diff --git a/lib/wraith/javascript/phantom.js b/lib/wraith/javascript/phantom.js
index 78f1a89b..34e11bcc 100644
--- a/lib/wraith/javascript/phantom.js
+++ b/lib/wraith/javascript/phantom.js
@@ -61,6 +61,13 @@ page.open(url, function(status) {
     phantom.exit();
   }
 
+  var height = page.evaluate(function() { return document.body.offsetHeight }),
+      width = page.evaluate(function() { return document.body.offsetWidth });
+
+  currentDimensions.viewportHeight = height;
+
+  page.viewportSize = { height:height, width:width }
+
   setTimeout(checkStatusOfAssets, waitTime);
 });