diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcc7729..09c8612 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,10 @@
 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).
-
 ## [1.0.1][1.0.1]
+### Added
+* php 7.4 support.
+
 ### Fix
 *   Fix repository language (PHP).
 
diff --git a/README.md b/README.md
index 60c053e..b7ab4be 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Currently supported payment methods are:
 * Sofort
 
 ## SYSTEM REQUIREMENTS
-This extension requires PHP 7.1, PHP 7.2 or PHP 7.3. 
+This extension requires PHP 7.1, PHP 7.2, PHP 7.3 or PHP 7.4. 
 It also depends on the heidelpay/heidelpay-php SDK, which will be installed along with the plugin.
 
 Please refer to the additional requirements listed under https://docs.heidelpay.com/docs/system-requirements (et seq.).
diff --git a/composer.json b/composer.json
index 36a4fa6..be7afe3 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "magento2-module",
     "license": "Apache-2.0",
     "require": {
-        "php": "~7.1.3|~7.2.0|~7.3.0",
+        "php": "~7.1.3|~7.2.0|~7.3.0|~7.4.0",
         "heidelpay/heidelpay-php": ">=1.2.7.0 <1.3.0.0",
         "ext-json": "*"
     },