diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb1cdfe7..f58af289 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+
+## [10.0.0] - 2023-11-16
 ### Added
 - [Python] added ci-environment implementation in Python
 - [Ruby] Initial rubocop configuration added ([#228](https://github.com/cucumber/ci-environment/pull/228))
@@ -175,7 +177,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - First release
 
-[Unreleased]: https://github.com/cucumber/ci-environment/compare/v9.2.0...main
+[Unreleased]: https://github.com/cucumber/ci-environment/compare/v10.0.0...main
+[10.0.0]: https://github.com/cucumber/ci-environment/compare/v9.2.0...main
 [9.2.0]: https://github.com/cucumber/ci-environment/compare/v9.1.0...main
 [9.1.0]: https://github.com/cucumber/ci-environment/compare/v9.0.4...main
 [9.0.4]: https://github.com/cucumber/ci-environment/compare/v9.0.3...main
diff --git a/java/pom.xml b/java/pom.xml
index 5666002e..a2184e16 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -10,14 +10,14 @@
     </parent>
 
     <artifactId>ci-environment</artifactId>
-    <version>9.2.1-SNAPSHOT</version>
+    <version>10.0.0</version>
     <packaging>jar</packaging>
     <name>Cucumber CiEnvironment</name>
     <description>Detect CI Environment from environment variables</description>
     <url>https://github.com/cucumber/ci-environment</url>
 
     <properties>
-        <project.build.outputTimestamp>1682671891</project.build.outputTimestamp>
+        <project.build.outputTimestamp>1700129766</project.build.outputTimestamp>
         <project.Automatic-Module-Name>io.cucumber.cienvironment</project.Automatic-Module-Name>
     </properties>
 
@@ -25,7 +25,7 @@
         <connection>scm:git:git://github.com/cucumber/ci-environment.git</connection>
         <developerConnection>scm:git:git@github.com:cucumber/ci-environment.git</developerConnection>
         <url>git://github.com/cucumber/ci-environment.git</url>
-        <tag>HEAD</tag>
+        <tag>v10.0.0</tag>
     </scm>
 
     <dependencyManagement>
diff --git a/javascript/package-lock.json b/javascript/package-lock.json
index b3c94c4c..73c5f5b7 100644
--- a/javascript/package-lock.json
+++ b/javascript/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@cucumber/ci-environment",
-  "version": "9.2.0",
+  "version": "10.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@cucumber/ci-environment",
-      "version": "9.2.0",
+      "version": "10.0.0",
       "license": "MIT",
       "devDependencies": {
         "@types/glob": "8.1.0",
diff --git a/javascript/package.json b/javascript/package.json
index 66bb24ea..cae27d5f 100644
--- a/javascript/package.json
+++ b/javascript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cucumber/ci-environment",
-  "version": "9.2.0",
+  "version": "10.0.0",
   "description": "Detect CI Environment from environment variables",
   "type": "module",
   "main": "dist/cjs/src/index.js",
diff --git a/python/pyproject.toml b/python/pyproject.toml
index e72deafd..abeea602 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -34,7 +34,7 @@ maintainers = [
 name = "ci-environment"
 requires-python = ">=3.8"
 urls = {Repository = "https://github.com/cucumber/ci-environment"}
-version = "0.1.0"
+version = "10.0.0"
 
 [project.entry-points]
 
diff --git a/ruby/VERSION b/ruby/VERSION
index deeb3d66..a13e7b9c 100644
--- a/ruby/VERSION
+++ b/ruby/VERSION
@@ -1 +1 @@
-9.2.0
+10.0.0