diff --git a/CHANGES b/CHANGES
index 05713a5c..247fe430 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+4.4.0.0 2021-01-01
+- Security: remove infrastructure of stream ciphers (#3048)
+- Other minor bug fixes and improvements
+
 4.3.3.0 2020-12-07
 - PAC: Add option for custom sha256sum URL of custom geosite source (#3026)
 - Update to .NET Framework 4.8
diff --git a/appveyor.yml b/appveyor.yml
index 30bfc32d..ee2cb6f8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -11,7 +11,7 @@
 
 # version format
 # Build version format is taken from UI if it is not set
-version: 4.3.3.{build}
+version: 4.4.0.{build}
 
 # # branches to build
 # branches:
diff --git a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
index 7de68cc7..c8a49ee0 100644
--- a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
+++ b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
@@ -33,7 +33,7 @@ namespace Shadowsocks.Controller
 
         public event EventHandler CheckUpdateCompleted;
 
-        public const string Version = "4.3.3.0";
+        public const string Version = "4.4.0.0";
         private readonly Version _version;
 
         public UpdateChecker()