diff --git a/ChangeLog-10.0.md b/ChangeLog-10.0.md
new file mode 100644
index 00000000000..889f1623d8c
--- /dev/null
+++ b/ChangeLog-10.0.md
@@ -0,0 +1,7 @@
+# Changes in PHPUnit 10.0
+
+All notable changes of the PHPUnit 10.0 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
+
+## [10.0.0] - 2021-02-05
+
+[10.0.0]: https://github.com/sebastianbergmann/phpunit/compare/9.5...master
diff --git a/README.md b/README.md
index d6bb0846cce..79ba19f0380 100644
--- a/README.md
+++ b/README.md
@@ -4,17 +4,17 @@ PHPUnit is a programmer-oriented testing framework for PHP. It is an instance of
 
 [![Latest Stable Version](https://img.shields.io/packagist/v/phpunit/phpunit.svg?style=flat-square)](https://packagist.org/packages/phpunit/phpunit)
 [![Minimum PHP Version](https://img.shields.io/badge/php-%3E%3D%207.3-8892BF.svg?style=flat-square)](https://php.net/)
-[![CI Status](https://github.com/sebastianbergmann/phpunit/workflows/CI/badge.svg?branch=9.5&event=push)](https://phpunit.de/build-status.html)
+[![CI Status](https://github.com/sebastianbergmann/phpunit/workflows/CI/badge.svg?branch=master&event=push)](https://phpunit.de/build-status.html)
 [![Type Coverage](https://shepherd.dev/github/sebastianbergmann/phpunit/coverage.svg)](https://shepherd.dev/github/sebastianbergmann/phpunit)
 
 ## Installation
 
-We distribute a [PHP Archive (PHAR)](https://php.net/phar) that has all required (as well as some optional) dependencies of PHPUnit 9.5 bundled in a single file:
+We distribute a [PHP Archive (PHAR)](https://php.net/phar) that has all required (as well as some optional) dependencies of PHPUnit 10.0 bundled in a single file:
 
 ```bash
-$ wget https://phar.phpunit.de/phpunit-9.5.phar
+$ wget https://phar.phpunit.de/phpunit-nightly.phar
 
-$ php phpunit-9.5.phar --version
+$ php phpunit-nightly.phar --version
 ```
 
 Alternatively, you may use [Composer](https://getcomposer.org/) to download and install PHPUnit as well as its dependencies. Please refer to the "[Getting Started](https://phpunit.de/getting-started-with-phpunit.html)" guide for details on how to install PHPUnit.
diff --git a/composer.json b/composer.json
index fd6461fc360..a2f88661afe 100644
--- a/composer.json
+++ b/composer.json
@@ -88,7 +88,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "9.5-dev"
+            "dev-master": "10.0-dev"
         }
     }
 }
diff --git a/phpunit.xsd b/phpunit.xsd
index 3785d21fef7..78a37ad8d93 100644
--- a/phpunit.xsd
+++ b/phpunit.xsd
@@ -2,7 +2,7 @@
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
     <xs:annotation>
         <xs:documentation source="https://phpunit.de/documentation.html">
-            This Schema file defines the rules by which the XML configuration file of PHPUnit 9.5 may be structured.
+            This Schema file defines the rules by which the XML configuration file of PHPUnit 10.0 may be structured.
         </xs:documentation>
         <xs:appinfo source="https://phpunit.de/documentation.html"/>
     </xs:annotation>
diff --git a/src/Runner/Version.php b/src/Runner/Version.php
index 47a8ed43572..e652256c331 100644
--- a/src/Runner/Version.php
+++ b/src/Runner/Version.php
@@ -41,7 +41,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('9.5.0', dirname(__DIR__, 2)))->getVersion();
+            self::$version = (new VersionId('10.0', dirname(__DIR__, 2)))->getVersion();
         }
 
         return self::$version;