diff --git a/project/Build.scala b/project/Build.scala
index d74bcc5a..6b230401 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -5,8 +5,8 @@ import sbtandroid._
 import sbtandroid.AndroidKeys._
 
 object App {
-  val version = "1.7.2"
-  val versionCode = 39
+  val version = "1.7.3"
+  val versionCode = 40
 }
 
 object General {
diff --git a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
index 122a3a4f..f98936c4 100644
--- a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
+++ b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
@@ -70,9 +70,9 @@ import com.google.ads.{AdRequest, AdSize, AdView}
 object Shadowsocks {
 
   val PREFS_NAME = "Shadowsocks"
-  val PROXY_PREFS = Array("proxy", "remotePort", "port", "sitekey", "encMethod")
-  val FEATRUE_PREFS = Array("isGFWList", "isGlobalProxy", "isBypassApps", "proxyedApps",
-    "isAutoConnect")
+  val PROXY_PREFS = Array(Key.proxy, Key.remotePort, Key.localPort, Key.sitekey, Key.encMethod)
+  val FEATRUE_PREFS = Array(Key.isGFWList, Key.isGlobalProxy, Key.isBypassApps, Key.proxyedApps,
+    Key.isTrafficStat, Key.isAutoConnect)
   val TAG = "Shadowsocks"
   val REQUEST_CONNECT = 1