diff --git a/app/assets/stylesheets/admin/preview.sass b/app/assets/stylesheets/admin/preview.sass
index 494cf4bde41cf6b51a556452aad621aba6903099..49596e58697528e98f5785bc863163d63fee1b70 100644
--- a/app/assets/stylesheets/admin/preview.sass
+++ b/app/assets/stylesheets/admin/preview.sass
@@ -2,3 +2,6 @@
     img
         height: auto
         max-width: 100%
+    iframe
+        height: 220px
+        max-width: 100%