diff --git a/contrib/templates/default/postform.mustache b/contrib/templates/default/postform.mustache
index c2427b9..a300e42 100644
--- a/contrib/templates/default/postform.mustache
+++ b/contrib/templates/default/postform.mustache
@@ -42,7 +42,7 @@
              File
            </th>
            <td>
-             <input type="file" name="attachment" />
+             <input type="file" name="attachment" style="max-width: 330px;" />
            </td>
          </tr>
          <tr>