diff --git a/Makefile b/Makefile
index 1278c58..cef4c15 100644
--- a/Makefile
+++ b/Makefile
@@ -30,9 +30,12 @@ test: vendor fixtures/vendor fixtures/vendor-bin/sub/vendor
 
 vendor:
 	composer update
+	touch $@
 
 fixtures/vendor:
 	composer update --working-dir fixtures --no-interaction ${COMPOSER_FLAGS}
+	touch $@
 
 fixtures/vendor-bin/sub/vendor:
 	composer update --working-dir fixtures/vendor-bin/sub --no-interaction ${COMPOSER_FLAGS}
+	touch $@
diff --git a/fixtures/vendor-bin/sub/composer.lock b/fixtures/vendor-bin/sub/composer.lock
index 3a4eacb..4a21017 100644
--- a/fixtures/vendor-bin/sub/composer.lock
+++ b/fixtures/vendor-bin/sub/composer.lock
@@ -1,7 +1,7 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
     "content-hash": "a2697ba1372bdcb8a714bf07352ac794",
@@ -12,22 +12,26 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/theofidry/composer-inheritance-plugin.git",
-                "reference": "2fa7015851f29ddfbb0d4e8b49b9722007c4000a"
+                "reference": "4bd31c5fde8999ac9a6b4048e5b249de38b5c134"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theofidry/composer-inheritance-plugin/zipball/2fa7015851f29ddfbb0d4e8b49b9722007c4000a",
-                "reference": "2fa7015851f29ddfbb0d4e8b49b9722007c4000a",
+                "url": "https://api.github.com/repos/theofidry/composer-inheritance-plugin/zipball/4bd31c5fde8999ac9a6b4048e5b249de38b5c134",
+                "reference": "4bd31c5fde8999ac9a6b4048e5b249de38b5c134",
                 "shasum": ""
             },
             "require": {
-                "composer-plugin-api": "^1.0",
-                "php": "^5.3.0 || ^7.0.0",
-                "wikimedia/composer-merge-plugin": "^1.3"
+                "composer-plugin-api": "^1.0 || ^2.0",
+                "php": "^7.2 || ^8.0",
+                "wikimedia/composer-merge-plugin": "^2.0"
+            },
+            "conflict": {
+                "composer/composer": ">=2.0,<2.0.13"
             },
             "require-dev": {
-                "composer/composer": "^1.0"
+                "composer/composer": "^1.0 || ^2.0"
             },
+            "default-branch": true,
             "type": "composer-plugin",
             "extra": {
                 "class": "Fidry\\Composer\\InheritancePlugin\\InheritancePlugin"
@@ -48,42 +52,52 @@
                 }
             ],
             "description": "Composer plugin to merge multiple sub composer.json files",
-            "time": "2017-09-10T10:25:51+00:00"
+            "support": {
+                "issues": "https://github.com/theofidry/composer-inheritance-plugin/issues",
+                "source": "https://github.com/theofidry/composer-inheritance-plugin/tree/master"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theofidry",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-10-11T06:32:45+00:00"
         },
         {
             "name": "wikimedia/composer-merge-plugin",
-            "version": "v1.4.1",
+            "version": "v2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/wikimedia/composer-merge-plugin.git",
-                "reference": "81c6ac72a24a67383419c7eb9aa2b3437f2ab100"
+                "reference": "8ca2ed8ab97c8ebce6b39d9943e9909bb4f18912"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/wikimedia/composer-merge-plugin/zipball/81c6ac72a24a67383419c7eb9aa2b3437f2ab100",
-                "reference": "81c6ac72a24a67383419c7eb9aa2b3437f2ab100",
+                "url": "https://api.github.com/repos/wikimedia/composer-merge-plugin/zipball/8ca2ed8ab97c8ebce6b39d9943e9909bb4f18912",
+                "reference": "8ca2ed8ab97c8ebce6b39d9943e9909bb4f18912",
                 "shasum": ""
             },
             "require": {
-                "composer-plugin-api": "^1.0",
-                "php": ">=5.3.2"
+                "composer-plugin-api": "^1.1||^2.0",
+                "php": ">=7.2.0"
             },
             "require-dev": {
-                "composer/composer": "~1.0.0",
-                "jakub-onderka/php-parallel-lint": "~0.8",
-                "phpunit/phpunit": "~4.8|~5.0",
-                "squizlabs/php_codesniffer": "~2.1.0"
+                "composer/composer": "^1.1||^2.0",
+                "php-parallel-lint/php-parallel-lint": "~1.1.0",
+                "phpunit/phpunit": "^8.5||^9.0",
+                "squizlabs/php_codesniffer": "~3.5.4"
             },
             "type": "composer-plugin",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3.x-dev"
+                    "dev-master": "2.x-dev"
                 },
-                "class": "Wikimedia\\Composer\\MergePlugin"
+                "class": "Wikimedia\\Composer\\Merge\\V2\\MergePlugin"
             },
             "autoload": {
                 "psr-4": {
-                    "Wikimedia\\Composer\\": "src/"
+                    "Wikimedia\\Composer\\Merge\\V2\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -97,7 +111,11 @@
                 }
             ],
             "description": "Composer plugin to merge multiple composer.json files",
-            "time": "2017-04-25T02:31:25+00:00"
+            "support": {
+                "issues": "https://github.com/wikimedia/composer-merge-plugin/issues",
+                "source": "https://github.com/wikimedia/composer-merge-plugin/tree/v2.0.1"
+            },
+            "time": "2021-02-24T05:28:06+00:00"
         }
     ],
     "packages-dev": [],
@@ -109,5 +127,6 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": [],
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.1.0"
 }
diff --git a/src/InheritancePlugin.php b/src/InheritancePlugin.php
index f6ea983..ae0749c 100644
--- a/src/InheritancePlugin.php
+++ b/src/InheritancePlugin.php
@@ -15,8 +15,8 @@
 use Composer\IO\IOInterface;
 use Composer\Package\Package;
 use Fidry\Composer\InheritancePlugin\Merge\PluginState;
-use Wikimedia\Composer\Logger;
-use Wikimedia\Composer\MergePlugin as WikimediaMergePlugin;
+use Wikimedia\Composer\Merge\V2\Logger;
+use Wikimedia\Composer\Merge\V2\MergePlugin as WikimediaMergePlugin;
 
 /**
  * @author Théo FIDRY <theo.fidry@gmail.com>
diff --git a/src/Merge/ExtraPackage.php b/src/Merge/ExtraPackage.php
index f73bc7b..c15d7d8 100644
--- a/src/Merge/ExtraPackage.php
+++ b/src/Merge/ExtraPackage.php
@@ -12,7 +12,7 @@
 namespace Fidry\Composer\InheritancePlugin\Merge;
 
 use Fidry\Composer\InheritancePlugin\InheritancePlugin;
-use Wikimedia\Composer\Merge\ExtraPackage as WikimediaExtraPackage;
+use Wikimedia\Composer\Merge\V2\ExtraPackage as WikimediaExtraPackage;
 
 /**
  * @author Théo FIDRY <theo.fidry@gmail.com>
diff --git a/src/Merge/PluginState.php b/src/Merge/PluginState.php
index 920dc13..80dcc9e 100644
--- a/src/Merge/PluginState.php
+++ b/src/Merge/PluginState.php
@@ -11,7 +11,7 @@
 
 namespace Fidry\Composer\InheritancePlugin\Merge;
 
-use Wikimedia\Composer\Merge\PluginState as WikimediaPluginState;
+use Wikimedia\Composer\Merge\V2\PluginState as WikimediaPluginState;
 
 /**
  * @author Théo FIDRY <theo.fidry@gmail.com>