diff --git a/composer.json b/composer.json
index eb8d970..bb84642 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "php": "^7.2"
   },
   "require-dev": {
-    "ergebnis/composer-normalize": "^2.4.0",
+    "ergebnis/composer-normalize": "^2.5.0",
     "ergebnis/license": "~0.1.0",
     "ergebnis/php-cs-fixer-config": "^2.1.2",
     "ergebnis/phpstan-rules": "~0.14.4",
diff --git a/composer.lock b/composer.lock
index db12aff..b7e07b5 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0987c915fe7a6b170cc9ac82a6097e9d",
+    "content-hash": "99aefb36833fc37c0fb7289c51699c56",
     "packages": [],
     "packages-dev": [
         {
@@ -499,16 +499,16 @@
         },
         {
             "name": "ergebnis/composer-normalize",
-            "version": "2.4.0",
+            "version": "2.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/ergebnis/composer-normalize.git",
-                "reference": "6129311c1738bd45a06ed7c3773b631d75336f93"
+                "reference": "ae076999ae6a4a4641906db0e947dd70391ac296"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/ergebnis/composer-normalize/zipball/6129311c1738bd45a06ed7c3773b631d75336f93",
-                "reference": "6129311c1738bd45a06ed7c3773b631d75336f93",
+                "url": "https://api.github.com/repos/ergebnis/composer-normalize/zipball/ae076999ae6a4a4641906db0e947dd70391ac296",
+                "reference": "ae076999ae6a4a4641906db0e947dd70391ac296",
                 "shasum": ""
             },
             "require": {
@@ -519,10 +519,8 @@
                 "php": "^7.1"
             },
             "require-dev": {
-                "composer/composer": "^1.10.5",
+                "composer/composer": "^1.10.5 || ^2.0.0",
                 "composer/package-versions-deprecated": "^1.8.0",
-                "ergebnis/license": "~0.1.0",
-                "ergebnis/php-cs-fixer-config": "^2.1.2",
                 "ergebnis/phpstan-rules": "~0.14.4",
                 "ergebnis/test-util": "~1.0.0",
                 "jangregor/phpstan-prophecy": "~0.6.2",
@@ -532,9 +530,7 @@
                 "phpstan/phpstan-phpunit": "~0.12.8",
                 "phpstan/phpstan-strict-rules": "~0.12.2",
                 "phpunit/phpunit": "^7.5.20",
-                "psalm/plugin-phpunit": "~0.10.0",
-                "symfony/filesystem": "^4.4.7",
-                "vimeo/psalm": "^3.11.2"
+                "symfony/filesystem": "^4.4.8"
             },
             "type": "composer-plugin",
             "extra": {
@@ -563,7 +559,7 @@
                 "normalizer",
                 "plugin"
             ],
-            "time": "2020-04-26T18:11:30+00:00"
+            "time": "2020-04-30T21:23:32+00:00"
         },
         {
             "name": "ergebnis/json-normalizer",