diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff34155..516aa0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ 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).
 
+## [1.4] - 2018-10-10
+
+### Changed
+
+- Update phpcompatibility to 9.0.0
+
 ## [1.3] - 2018-07-17
 
 ### Changed
diff --git a/composer.json b/composer.json
index 4ff49bf..7d0fa25 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "description": "PHP 7.x compatibility checker",
     "require-dev": {
         "squizlabs/php_codesniffer": "3.3.2",
-        "phpcompatibility/php-compatibility": "8.2.0"
+        "phpcompatibility/php-compatibility": "9.0.0"
     },
     "prefer-stable" : true,
     "scripts": {
diff --git a/composer.lock b/composer.lock
index d93aba6..3edc318 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,21 +4,21 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "ac1c2496f4245f0574fcc588a586f8b8",
+    "content-hash": "80f55e0b3b31cbdcfd1ad80657fa104c",
     "packages": [],
     "packages-dev": [
         {
             "name": "phpcompatibility/php-compatibility",
-            "version": "8.2.0",
+            "version": "9.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCompatibility/PHPCompatibility.git",
-                "reference": "eaf613c1a8265bcfd7b0ab690783f2aef519f78a"
+                "reference": "e9f4047e5edf53c88f36f1dafc0d49454ce13e25"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibility/zipball/eaf613c1a8265bcfd7b0ab690783f2aef519f78a",
-                "reference": "eaf613c1a8265bcfd7b0ab690783f2aef519f78a",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibility/zipball/e9f4047e5edf53c88f36f1dafc0d49454ce13e25",
+                "reference": "e9f4047e5edf53c88f36f1dafc0d49454ce13e25",
                 "shasum": ""
             },
             "require": {
@@ -36,29 +36,34 @@
                 "roave/security-advisories": "dev-master || Helps prevent installing dependencies with known security issues."
             },
             "type": "phpcodesniffer-standard",
-            "autoload": {
-                "psr-4": {
-                    "PHPCompatibility\\": "PHPCompatibility/"
-                }
-            },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "LGPL-3.0-or-later"
             ],
             "authors": [
+                {
+                    "name": "Contributors",
+                    "homepage": "https://github.com/PHPCompatibility/PHPCompatibility/graphs/contributors"
+                },
                 {
                     "name": "Wim Godden",
+                    "homepage": "https://github.com/wimg",
+                    "role": "lead"
+                },
+                {
+                    "name": "Juliette Reinders Folmer",
+                    "homepage": "https://github.com/jrfnl",
                     "role": "lead"
                 }
             ],
-            "description": "A set of sniffs for PHP_CodeSniffer that checks for PHP version compatibility.",
+            "description": "A set of sniffs for PHP_CodeSniffer that checks for PHP cross-version compatibility.",
             "homepage": "http://techblog.wimgodden.be/tag/codesniffer/",
             "keywords": [
                 "compatibility",
                 "phpcs",
                 "standards"
             ],
-            "time": "2018-07-17T13:42:26+00:00"
+            "time": "2018-10-07T17:38:02+00:00"
         },
         {
             "name": "squizlabs/php_codesniffer",