diff --git a/ckan/public/base/datapreview/javascript/datapreview.js b/ckan/public/base/datapreview/javascript/datapreview.js
index 6b81606eedc..3687a820741 100644
--- a/ckan/public/base/datapreview/javascript/datapreview.js
+++ b/ckan/public/base/datapreview/javascript/datapreview.js
@@ -255,7 +255,7 @@ CKAN.DataPreview = function ($, my) {
       var el = $('<iframe></iframe>');
       el.attr('src', resourceData.url);
       el.attr('width', '100%');
-      el.attr('height', '100%');
+      el.attr('height', '400px');
       my.$dialog.append(el);
     }
     // images