diff --git a/CHANGES b/CHANGES
index df39f170..d48f5705 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+4.0.1 2017-04-08
+- Fix UDP relay
+- Allow to add multiple servers via Shadowsocks URL
+- Bug fixes and improvements
+
 4.0 2017-04-04
 - Add AEAD ciphers support, removed OTA
 - I18N: add Japanese support, update Traditional Chinese strings
diff --git a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
index 19e73b2a..367213be 100644
--- a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
+++ b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
@@ -24,7 +24,7 @@ namespace Shadowsocks.Controller
         public string LatestVersionLocalName;
         public event EventHandler CheckUpdateCompleted;
 
-        public const string Version = "4.0";
+        public const string Version = "4.0.1";
 
         private class CheckUpdateTimer : System.Timers.Timer
         {