diff --git a/src/Ui/UiWebsocket.py b/src/Ui/UiWebsocket.py
index 22680efb..ea65d567 100644
--- a/src/Ui/UiWebsocket.py
+++ b/src/Ui/UiWebsocket.py
@@ -757,16 +757,24 @@ class UiWebsocket(object):
         else:
             self.response(to, {"error": "Unknown site: %s" % address})
 
-    def actionSiteClone(self, to, address, root_inner_path=""):
+    def actionSiteClone(self, to, address, root_inner_path="", target_address=None):
         self.cmd("notification", ["info", _["Cloning site..."]])
         site = self.server.sites.get(address)
-        # Generate a new site from user's bip32 seed
-        new_address, new_address_index, new_site_data = self.user.getNewSiteData()
-        new_site = site.clone(new_address, new_site_data["privatekey"], address_index=new_address_index, root_inner_path=root_inner_path)
-        new_site.settings["own"] = True
-        new_site.saveSettings()
-        self.cmd("notification", ["done", _["Site cloned"] + "<script>window.top.location = '/%s'</script>" % new_address])
-        gevent.spawn(new_site.announce)
+        if target_address:
+            target_site = self.server.sites.get(target_address)
+            privatekey = self.user.getSiteData(target_site.address).get("privatekey")
+            site.clone(target_address, privatekey, root_inner_path=root_inner_path)
+            self.cmd("notification", ["done", _["Site source code upgraded!"]])
+            site.publish()
+        else:
+            # Generate a new site from user's bip32 seed
+            new_address, new_address_index, new_site_data = self.user.getNewSiteData()
+            new_site = site.clone(new_address, new_site_data["privatekey"], address_index=new_address_index, root_inner_path=root_inner_path)
+            new_site.settings["own"] = True
+            new_site.saveSettings()
+            self.cmd("notification", ["done", _["Site cloned"] + "<script>window.top.location = '/%s'</script>" % new_address])
+            gevent.spawn(new_site.announce)
+
 
     def actionSiteSetLimit(self, to, size_limit):
         self.site.settings["size_limit"] = int(size_limit)