diff --git a/conf/app.conf-default b/conf/app.conf-default
index 7635ac1..595c005 100644
--- a/conf/app.conf-default
+++ b/conf/app.conf-default
@@ -4,7 +4,7 @@
 
 http.port=80
 
-site.url=http://localhost
+site.url=http://localhost # or http://x.com:8080, http://www.xx.com:9000
 
 # the administrator username
 adminUsername=admin
@@ -13,33 +13,19 @@ adminUsername=admin
 db.host=localhost
 db.port=27017
 db.dbname=leanote # required
-db.username=root # if not exists, please leave blank
-db.password=root123 # if not exists, please leave blank
+db.username=root # if not exists, please leave it blank
+db.password=root123 # if not exists, please leave it blank
 # or you can set the mongdb url for more complex needs the format is:
 # mongodb://myuser:mypass@localhost:40001,otherhost:40001/mydb
 # db.url=mongodb://root:root123@localhost:27017/leanote
 
-# email
-email.host=
-email.port=25
-email.username=
-email.password=
-
-# open for register?
-register.open=true
-register.sharedUserId=5368c1aa99c37b029d000001
-register.sharedUserShareNotebookId=5368c1aa99c37b029d000002
-register.welcomeNoteId=5368c1b919807a6f95000000
-
-#--------------------------------
-# revel config
-# for dev
-#--------------------------------
+# You Must Change It !! About Security!!
+app.secret=V85ZzBeTnzpsHyjQX4zukbQ8qqtju9y2aDM55VWxAH9Qop19poekx3xkcDVvrD0y 
 
 app.name=leanote
-app.secret=V85ZzBeTnzpsHyjQX4zukbQ8qqtju9y2aDM55VWxAH9Qop19poekx3xkcDVvrD0y
 http.addr=
 http.ssl=false
+cookie.domain=
 cookie.httponly=false
 cookie.prefix=LEANOTE
 cookie.secure=false
@@ -47,6 +33,11 @@ format.date=01/02/2006
 format.datetime=01/02/2006 15:04
 results.chunked=false
 
+#--------------------------------
+# revel config
+# for dev
+#--------------------------------
+
 log.trace.prefix = "TRACE "
 log.info.prefix  = "INFO  "
 log.warn.prefix  = "WARN  "