diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9884b1e..6fbcb16 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       max-parallel: 10
       fail-fast: false
       matrix:
-        php: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
     steps:
       - name: Set up PHP
@@ -45,7 +45,7 @@ jobs:
       - name: Set up PHP
         uses: shivammathur/setup-php@2.30.0
         with:
-          php-version: 7.3
+          php-version: 7.4
           coverage: none
           tools: flex
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13c2e2c..60c2c56 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,25 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [1.1.0] - 2024-11-26
+## [1.0.0] - unreleased
 
-### Changed
+First release supporting Guzzle 8.
 
-- Add support for PHP 8.4, drop support for PHP version 7.2
+### Upgrading from guzzle7-adapter
 
-### Fixed
-
-- Add missing `composer test` command and use it in CI
-- Fix deprecated usage of prophesize in phpunit tests
-
-## [1.0.0] - 2021-03-09
-
-- Stable release - no changes since 0.1.1
-
-## [0.1.1] - 2020-10-21
-
-* Allow installation with PHP 8
-
-## [0.1.0] - 2020-08-16
-
-First release
+?
diff --git a/README.md b/README.md
index 7e6b5b5..d96cb92 100644
--- a/README.md
+++ b/README.md
@@ -1,22 +1,22 @@
-# Guzzle 7 HTTP Adapter
+# Guzzle 8 HTTP Adapter
 
-[![Latest Version](https://img.shields.io/github/release/php-http/guzzle7-adapter.svg?style=flat-square)](https://github.com/php-http/guzzle7-adapter/releases)
+[![Latest Version](https://img.shields.io/github/release/php-http/guzzle8-adapter.svg?style=flat-square)](https://github.com/php-http/guzzle8-adapter/releases)
 [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
-[![Total Downloads](https://img.shields.io/packagist/dt/php-http/guzzle7-adapter.svg?style=flat-square)](https://packagist.org/packages/php-http/guzzle7-adapter)
+[![Total Downloads](https://img.shields.io/packagist/dt/php-http/guzzle8-adapter.svg?style=flat-square)](https://packagist.org/packages/php-http/guzzle8-adapter)
 
-**Guzzle 7 HTTP Adapter.**
+**Guzzle 8 HTTP Adapter.**
 
 ## Install
 
 Via Composer
 
 ``` bash
-$ composer require php-http/guzzle7-adapter
+$ composer require php-http/guzzle8-adapter
 ```
 
 ## Documentation
 
-Please see the [official documentation](http://docs.php-http.org/en/latest/clients/guzzle7-adapter.html).
+Please see the [official documentation](http://docs.php-http.org/en/latest/clients/guzzle8-adapter.html).
 
 ## Testing
 
diff --git a/composer.json b/composer.json
index 55ce418..f6b0916 100644
--- a/composer.json
+++ b/composer.json
@@ -11,10 +11,10 @@
         }
     ],
     "require": {
-        "php": "^7.3 | ^8.0",
+        "php": "^7.4 | ^8.0",
         "php-http/httplug": "^2.4",
         "psr/http-client": "^1.0.3",
-        "guzzlehttp/guzzle": "^7.10"
+        "guzzlehttp/guzzle": "^8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6.31 || ^10.0 || ^11.0 || ^12.0",