diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 92e2c39..8d92349 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.0, 8.1]
+        php: [8.1]
         dependency-version: [prefer-lowest, prefer-stable]
         os: [ubuntu-latest]
 
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index d5faa9c..8db5cb0 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -232,8 +232,6 @@
     ])
     ->name('*.php')
     ->notName('*.blade.php')
-    // Remove when dropping support for PHP 8.0
-    ->notName('MethodsTest.php')
     ->ignoreDotFiles(true)
     ->ignoreVCS(true);
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index eda8eec..eb8a79b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to `sebastiaanluca/php-pipe-operator` will be documented in
 
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## 5.1.0 (2022-03-17)
+
+### Removed
+
+- Dropped support for PHP 8
+
 ## 5.0.1 (2022-03-17)
 
 ### Fixed
diff --git a/composer.json b/composer.json
index d80e079..ba1994a 100644
--- a/composer.json
+++ b/composer.json
@@ -19,10 +19,10 @@
         }
     ],
     "require": {
-        "php": "~8.0|~8.1"
+        "php": "~8.1"
     },
     "require-dev": {
-        "ext-mbstring": "*",
+        "ext-mbstring": "~8.1",
         "friendsofphp/php-cs-fixer": "^3.7",
         "phpunit/phpunit": "^9.5"
     },
diff --git a/tests/MethodsTest.php b/tests/MethodsTest.php
index 8211d2e..2af9508 100644
--- a/tests/MethodsTest.php
+++ b/tests/MethodsTest.php
@@ -53,7 +53,6 @@ public function it can transform a value using a callable string method
 
     /**
      * @test
-     * @requires PHP >= 8.1
      */
     public function it can transform a value using a first class callable method(): void
     {
@@ -67,7 +66,6 @@ public function it can transform a value using a first class callable 
 
     /**
      * @test
-     * @requires PHP >= 8.1
      */
     public function it can transform a value using a first class callable method with parameters(): void
     {
@@ -125,7 +123,6 @@ public function it can transform a value using a public class method():
 
     /**
      * @test
-     * @requires PHP >= 8.1
      */
     public function it can transform a value using a first class callable class method(): void
     {