diff --git a/CHANGES b/CHANGES
index 1f9b71e4..329c1f8c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,17 @@
+4.1.9.0 2019-12-21
+- Refine merge PAC+abp script logic (#2598)
+- Format the proxy hostname in GfwListUpdater (#2616)
+- Fix the trayIcon display issue under Win10 dark theme (#2658)
+- Set default encryption method as chacha20-ietf-poly1305 (#2699)
+- Translate statistics config form (#2698)
+- Update .Net Framework download link (#2731)
+- Use MD5 hash instead of timestamp for PAC URL parameter (#2705)
+- Add option "Show Plugin Output" (#2722)
+- Support custom GFWListUrl defined in config file (#2728)
+- Implement new I18N csv structure (#2712)
+- Refine message when plugin program file does not exist (#2730)
+- Other minor bug fixes and improvements
+
 4.1.8 2019-10-31
 - Update the nuget configurations and packages
 - Fix some crash about thread-safe in statistics (#2591)
diff --git a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
index 68b57198..455a08e6 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 = "4.1.8.0";
+        public const string Version = "4.1.9.0";
 
         private class CheckUpdateTimer : System.Timers.Timer
         {