diff --git a/index.html b/index.html
index e55cf78..fee8afa 100644
--- a/index.html
+++ b/index.html
@@ -9,7 +9,7 @@
   #edit {font-family:monospace; font-weight:bold;color:rgba(0,0,0,0.54); position:absolute;z-index:100;position:absolute;top:0.85em; right:1em; display:none;}
   #edit:not(:hover) {text-decoration:none;}
 </style>
-<iframe id="iframe"></iframe>
+<iframe id="iframe" sandbox="allow-scripts allow-forms allow-top-navigation allow-popups allow-modals"></iframe>
 <a id="edit">edit</a>
 <script type="text/javascript">  
 function showEdit(editable) {
diff --git a/manifest.appcache b/manifest.appcache
index 4a59fbf..64895e6 100644
--- a/manifest.appcache
+++ b/manifest.appcache
@@ -2,4 +2,5 @@ CACHE MANIFEST
 
 CACHE:
 /
- 
\ No newline at end of file
+
+# v.3
\ No newline at end of file