diff --git a/lib/d/src/thrift/base.d b/lib/d/src/thrift/base.d
index e843a5c..ddc0dd4 100644
--- a/lib/d/src/thrift/base.d
+++ b/lib/d/src/thrift/base.d
@@ -50,7 +50,7 @@
 /// The Thrift version string, used for informative purposes.
 // Note: This is currently hardcoded, but will likely be filled in by the build
 // system in future versions.
-enum VERSION = "0.20.0";
+enum VERSION = "0.21.0";
 
 /**
  * Functions used for logging inside Thrift.
diff --git a/lib/dart/pubspec.yaml b/lib/dart/pubspec.yaml
index 7e20548..069818f 100644
--- a/lib/dart/pubspec.yaml
+++ b/lib/dart/pubspec.yaml
@@ -16,7 +16,7 @@
 # under the License.
 
 name: thrift
-version: 0.20.0
+version: 0.21.0
 description: >
   A Dart library for Apache Thrift
 author: Apache Thrift Developers <dev@thrift.apache.org>
diff --git a/lib/delphi/src/Thrift.pas b/lib/delphi/src/Thrift.pas
index 6696a19..9e1b0bb 100644
--- a/lib/delphi/src/Thrift.pas
+++ b/lib/delphi/src/Thrift.pas
@@ -28,7 +28,7 @@
   Thrift.Protocol;
 
 const
-  Version = '0.20.0';
+  Version = '0.21.0';
 
 type
   TException = Thrift.Exception.TException; // compatibility alias
diff --git a/lib/erl/src/thrift.app.src b/lib/erl/src/thrift.app.src
index 0e25b67..8431213 100644
--- a/lib/erl/src/thrift.app.src
+++ b/lib/erl/src/thrift.app.src
@@ -22,7 +22,7 @@
     {description, "Thrift bindings"},
 
   % The version of the applicaton
-  {vsn, "0.20.0"},
+  {vsn, "0.21.0"},
 
     % All modules used by the application.
     {modules, []},
diff --git a/lib/haxe/haxelib.json b/lib/haxe/haxelib.json
index 78779da..6f5de0b 100644
--- a/lib/haxe/haxelib.json
+++ b/lib/haxe/haxelib.json
@@ -10,7 +10,7 @@
 		"framework"
 	],
 	"description": "Haxe bindings for the Apache Thrift RPC and serialization framework",
-	"version": "0.20.0",
+	"version": "0.21.0",
 	"releasenote": "Licensed under Apache License, Version 2.0. The Apache Thrift compiler needs to be installed separately.",
 	"contributors": ["ApacheThrift"],
 	"dependencies": { 
diff --git a/lib/java/gradle.properties b/lib/java/gradle.properties
index 404318b..a3912e3 100644
--- a/lib/java/gradle.properties
+++ b/lib/java/gradle.properties
@@ -1,7 +1,7 @@
 # This file is shared currently between this Gradle build and the
 # Ant builds for fd303 and JavaScript. Keep the dotted notation for
 # the properties to minimize the changes in the dependencies.
-thrift.version=0.20.0
+thrift.version=0.21.0
 thrift.groupid=org.apache.thrift
 release=false
 
diff --git a/lib/js/package-lock.json b/lib/js/package-lock.json
index 0d9de12..8802661 100644
--- a/lib/js/package-lock.json
+++ b/lib/js/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "thrift",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
diff --git a/lib/js/package.json b/lib/js/package.json
index 8543b25..d9ab5a6 100644
--- a/lib/js/package.json
+++ b/lib/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "thrift",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "description": "Thrift is a software framework for scalable cross-language services development.",
   "main": "./src/thrift",
   "author": {
diff --git a/lib/js/src/thrift.js b/lib/js/src/thrift.js
index 7dbb560..de5ca19 100644
--- a/lib/js/src/thrift.js
+++ b/lib/js/src/thrift.js
@@ -46,7 +46,7 @@
      * @const {string} Version
      * @memberof Thrift
      */
-    Version: '0.20.0',
+    Version: '0.21.0',
 
     /**
      * Thrift IDL type string to Id mapping.
diff --git a/lib/lua/Thrift.lua b/lib/lua/Thrift.lua
index 1f9a562..212359b 100644
--- a/lib/lua/Thrift.lua
+++ b/lib/lua/Thrift.lua
@@ -48,7 +48,7 @@
   return count
 end
 
-version = '0.20.0'
+version = '0.21.0'
 
 TType = {
   STOP   = 0,
diff --git a/lib/netstd/Tests/Thrift.IntegrationTests/Thrift.IntegrationTests.csproj b/lib/netstd/Tests/Thrift.IntegrationTests/Thrift.IntegrationTests.csproj
index 3f83459..5602f91 100644
--- a/lib/netstd/Tests/Thrift.IntegrationTests/Thrift.IntegrationTests.csproj
+++ b/lib/netstd/Tests/Thrift.IntegrationTests/Thrift.IntegrationTests.csproj
@@ -23,7 +23,7 @@
     <LangVersion>latestMajor</LangVersion>
     <AssemblyName>Thrift.IntegrationTests</AssemblyName>
     <PackageId>Thrift.IntegrationTests</PackageId>
-    <Version>0.20.0.0</Version>
+    <Version>0.21.0.0</Version>
     <OutputType>Exe</OutputType>
     <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
     <GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute>
diff --git a/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/Thrift.PublicInterfaces.Compile.Tests.csproj b/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/Thrift.PublicInterfaces.Compile.Tests.csproj
index 7c57750..5745bd9 100644
--- a/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/Thrift.PublicInterfaces.Compile.Tests.csproj
+++ b/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/Thrift.PublicInterfaces.Compile.Tests.csproj
@@ -19,7 +19,7 @@
   -->
 
   <PropertyGroup>
-    <ThriftVersion>0.20.0</ThriftVersion>
+    <ThriftVersion>0.21.0</ThriftVersion>
     <ThriftVersionOutput>Thrift version $(ThriftVersion)</ThriftVersionOutput>
     <TargetFramework>net8.0</TargetFramework>
     <LangVersion>latestMajor</LangVersion>
diff --git a/lib/netstd/Tests/Thrift.Tests/Thrift.Tests.csproj b/lib/netstd/Tests/Thrift.Tests/Thrift.Tests.csproj
index a37be1b..7f9dcb7 100644
--- a/lib/netstd/Tests/Thrift.Tests/Thrift.Tests.csproj
+++ b/lib/netstd/Tests/Thrift.Tests/Thrift.Tests.csproj
@@ -21,7 +21,7 @@
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <LangVersion>latestMajor</LangVersion>
-    <Version>0.20.0.0</Version>
+    <Version>0.21.0.0</Version>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
diff --git a/lib/netstd/Thrift/Properties/AssemblyInfo.cs b/lib/netstd/Thrift/Properties/AssemblyInfo.cs
index bd84c4e..383b256 100644
--- a/lib/netstd/Thrift/Properties/AssemblyInfo.cs
+++ b/lib/netstd/Thrift/Properties/AssemblyInfo.cs
@@ -52,5 +52,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 
-[assembly: AssemblyVersion("0.20.0.0")]
-[assembly: AssemblyFileVersion("0.20.0.0")]
+[assembly: AssemblyVersion("0.21.0.0")]
+[assembly: AssemblyFileVersion("0.21.0.0")]
diff --git a/lib/netstd/Thrift/Thrift.csproj b/lib/netstd/Thrift/Thrift.csproj
index d255f37..3aa16d2 100644
--- a/lib/netstd/Thrift/Thrift.csproj
+++ b/lib/netstd/Thrift/Thrift.csproj
@@ -40,8 +40,8 @@
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>thrift.snk</AssemblyOriginatorKeyFile>
     <DelaySign>false</DelaySign>
-    <Title>Apache Thrift 0.20.0</Title>
-    <Version>0.20.0.0</Version>
+    <Title>Apache Thrift 0.21.0</Title>
+    <Version>0.21.0.0</Version>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <PackageProjectUrl>http://thrift.apache.org/</PackageProjectUrl>
     <Authors>Apache Thrift Developers</Authors>
@@ -50,7 +50,7 @@
     <PackageDescription>C# .NET Core bindings for the Apache Thrift RPC system</PackageDescription>
     <PackageReleaseNotes></PackageReleaseNotes>
     <PackageTags>Apache Thrift RPC</PackageTags>
-    <PackageReleaseNotes>https://github.com/apache/thrift/blob/0.20.0/CHANGES.md</PackageReleaseNotes>
+    <PackageReleaseNotes>https://github.com/apache/thrift/blob/0.21.0/CHANGES.md</PackageReleaseNotes>
 	<PackageReadmeFile>README.md</PackageReadmeFile>
     <Copyright>Copyright 2023 The Apache Software Foundation</Copyright>
   </PropertyGroup>
diff --git a/lib/ocaml/_oasis b/lib/ocaml/_oasis
index be1ce12..adf6198 100644
--- a/lib/ocaml/_oasis
+++ b/lib/ocaml/_oasis
@@ -1,5 +1,5 @@
 Name: libthrift-ocaml
-Version: 0.20.0
+Version: 0.21.0
 OASISFormat: 0.3
 Synopsis: OCaml bindings for the Apache Thrift RPC system
 Authors: Apache Thrift Developers <dev@thrift.apache.org>
diff --git a/lib/perl/lib/Thrift.pm b/lib/perl/lib/Thrift.pm
index 4b5f781..45bf33b 100644
--- a/lib/perl/lib/Thrift.pm
+++ b/lib/perl/lib/Thrift.pm
@@ -31,6 +31,6 @@
 #
 
 package Thrift;
-use version 0.77; our $VERSION = version->declare("v0.20.0");
+use version 0.77; our $VERSION = version->declare("v0.21.0");
 
 1;
diff --git a/lib/py/setup.py b/lib/py/setup.py
index f5371af..31e2bae 100644
--- a/lib/py/setup.py
+++ b/lib/py/setup.py
@@ -105,7 +105,7 @@
     twisted_deps = ['twisted']
 
     setup(name='thrift',
-          version='0.20.0',
+          version='0.21.0',
           description='Python bindings for the Apache Thrift RPC system',
           long_description=read_file("README.md"),
           long_description_content_type="text/markdown",
diff --git a/lib/rb/thrift.gemspec b/lib/rb/thrift.gemspec
index 6b510c7..86d2189 100644
--- a/lib/rb/thrift.gemspec
+++ b/lib/rb/thrift.gemspec
@@ -3,7 +3,7 @@
 
 Gem::Specification.new do |s|
   s.name        = 'thrift'
-  s.version     = '0.20.0'
+  s.version     = '0.21.0'
   s.authors     = ['Apache Thrift Developers']
   s.email       = ['dev@thrift.apache.org']
   s.homepage    = 'http://thrift.apache.org'
diff --git a/lib/rs/Cargo.toml b/lib/rs/Cargo.toml
index a6e8533..dd4a1b6 100644
--- a/lib/rs/Cargo.toml
+++ b/lib/rs/Cargo.toml
@@ -2,7 +2,7 @@
 name = "thrift"
 description = "Rust bindings for the Apache Thrift RPC system"
 edition = "2021"
-version = "0.20.0"
+version = "0.21.0"
 license = "Apache-2.0"
 authors = ["Apache Thrift Developers <dev@thrift.apache.org>"]
 homepage = "http://thrift.apache.org"
diff --git a/lib/st/package.xml b/lib/st/package.xml
index 7af883e..d606aad 100644
--- a/lib/st/package.xml
+++ b/lib/st/package.xml
@@ -17,7 +17,7 @@
  specific language governing permissions and limitations
  under the License.
  -->
-<!-- Apache Thrift Smalltalk library version 0.20.0 -->
+<!-- Apache Thrift Smalltalk library version 0.21.0 -->
 <package>
   <name>libthrift-st</name>
   <file>thrift.st</file>
diff --git a/lib/swift/Sources/Thrift.swift b/lib/swift/Sources/Thrift.swift
index 22981a0..d78cff6 100644
--- a/lib/swift/Sources/Thrift.swift
+++ b/lib/swift/Sources/Thrift.swift
@@ -1,3 +1,3 @@
 class Thrift {
-	let version = "0.20.0"
+	let version = "0.21.0"
 }
diff --git a/lib/swift/Tests/ThriftTests/ThriftTests.swift b/lib/swift/Tests/ThriftTests/ThriftTests.swift
index 3c6854c..10121e7 100644
--- a/lib/swift/Tests/ThriftTests/ThriftTests.swift
+++ b/lib/swift/Tests/ThriftTests/ThriftTests.swift
@@ -3,7 +3,7 @@
 
 class ThriftTests: XCTestCase {
   func testVersion() {
-    XCTAssertEqual(Thrift().version, "0.20.0")
+    XCTAssertEqual(Thrift().version, "0.21.0")
   }
 
   static var allTests : [(String, (ThriftTests) -> () throws -> Void)] {
diff --git a/lib/ts/package-lock.json b/lib/ts/package-lock.json
index f99d8a3..31e0c52 100644
--- a/lib/ts/package-lock.json
+++ b/lib/ts/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "thrift",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
diff --git a/lib/ts/package.json b/lib/ts/package.json
index 054807f..f296065 100644
--- a/lib/ts/package.json
+++ b/lib/ts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "thrift",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "description": "Thrift is a software framework for scalable cross-language services development.",
   "author": {
     "name": "Apache Thrift Developers",