diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index 656e25f..8c365eb 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -19,6 +19,9 @@ jobs:
         php-version:
           - "7.1"
 
+        dependencies:
+          - "locked"
+
     steps:
       - name: "Checkout"
         uses: "actions/checkout@v2"
@@ -32,10 +35,23 @@ jobs:
       - name: "Validate composer.json and composer.lock"
         run: "composer validate --strict"
 
-      - name: "Run ergebnis/composer-normalize"
-        uses: "docker://ergebnis/composer-normalize-action:0.8.0"
+      - name: "Determine composer cache directory"
+        id: "determine-composer-cache-directory"
+        run: "echo \"::set-output name=directory::$(composer config cache-dir)\""
+
+      - name: "Cache dependencies installed with composer"
+        uses: "actions/cache@v2"
         with:
-          args: "--dry-run"
+          path: "${{ steps.determine-composer-cache-directory.outputs.directory }}"
+          key: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('composer.lock') }}"
+          restore-keys: "php-${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-"
+
+      - name: "Install locked dependencies from composer.lock"
+        if: "matrix.dependencies == 'locked'"
+        run: "composer install --no-interaction --no-progress --no-suggest"
+
+      - name: "Run ergebnis/composer-normalize"
+        run: "composer normalize --dry-run"
 
   tests:
     name: "Tests"
diff --git a/Makefile b/Makefile
index a41c99e..00bcc3d 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ it: coding-standards tests ## Runs the coding-standards and tests target
 
 .PHONY: coding-standards
 coding-standards: vendor ## Normalizes composer.json with ergebnis/composer-normalize
-	docker run --interactive --rm --tty --workdir=/app --volume ${PWD}:/app ergebnis/composer-normalize-action:0.8.0
+	composer normalize
 
 .PHONY: help
 help: ## Displays this list of targets with descriptions
diff --git a/composer.json b/composer.json
index 7d6a24b..a670a4f 100644
--- a/composer.json
+++ b/composer.json
@@ -14,6 +14,7 @@
         "php": "^7.1"
     },
     "require-dev": {
+        "ergebnis/composer-normalize": "^2.5.1",
         "phpunit/phpunit": "^4.8"
     },
     "config": {
diff --git a/composer.lock b/composer.lock
index d38b7df..e1f7fa4 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": "cfdbe6c807dc80c3283620b99c7cefbe",
+    "content-hash": "8062ec7f33dfc48ff8fe95b6f8ad8796",
     "packages": [],
     "packages-dev": [
         {
@@ -61,6 +61,339 @@
             ],
             "time": "2015-06-14T21:17:01+00:00"
         },
+        {
+            "name": "ergebnis/composer-normalize",
+            "version": "2.5.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ergebnis/composer-normalize.git",
+                "reference": "d0faf549e565757a7ffbf1f306a4293080e43bdd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ergebnis/composer-normalize/zipball/d0faf549e565757a7ffbf1f306a4293080e43bdd",
+                "reference": "d0faf549e565757a7ffbf1f306a4293080e43bdd",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.1.0 || ^2.0.0",
+                "ergebnis/json-normalizer": "~0.12.0",
+                "ergebnis/json-printer": "^3.0.2",
+                "localheinz/diff": "^1.0.1",
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "composer/composer": "^1.10.5 || ^2.0.0",
+                "composer/package-versions-deprecated": "^1.8.0",
+                "ergebnis/phpstan-rules": "~0.14.4",
+                "ergebnis/test-util": "~1.0.0",
+                "jangregor/phpstan-prophecy": "~0.6.2",
+                "phpstan/extension-installer": "^1.0.4",
+                "phpstan/phpstan": "~0.12.19",
+                "phpstan/phpstan-deprecation-rules": "~0.12.2",
+                "phpstan/phpstan-phpunit": "~0.12.8",
+                "phpstan/phpstan-strict-rules": "~0.12.2",
+                "phpunit/phpunit": "^7.5.20",
+                "symfony/filesystem": "^4.4.8"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "Ergebnis\\Composer\\Normalize\\NormalizePlugin"
+            },
+            "autoload": {
+                "psr-4": {
+                    "Ergebnis\\Composer\\Normalize\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Andreas Möller",
+                    "email": "am@localheinz.com"
+                }
+            ],
+            "description": "Provides a composer plugin for normalizing composer.json.",
+            "homepage": "https://github.com/ergebnis/composer-normalize",
+            "keywords": [
+                "composer",
+                "normalize",
+                "normalizer",
+                "plugin"
+            ],
+            "funding": [
+                {
+                    "url": "https://paypal.me/localheinz",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.amazon.de/hz/wishlist/ls/2NCHMSJ4BC1OW",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.buymeacoffee.com/localheinz",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/localheinz",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-05-01T12:02:09+00:00"
+        },
+        {
+            "name": "ergebnis/json-normalizer",
+            "version": "0.12.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ergebnis/json-normalizer.git",
+                "reference": "0197447cd5d8f7e82116e904196a3e9f470655db"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ergebnis/json-normalizer/zipball/0197447cd5d8f7e82116e904196a3e9f470655db",
+                "reference": "0197447cd5d8f7e82116e904196a3e9f470655db",
+                "shasum": ""
+            },
+            "require": {
+                "ergebnis/json-printer": "^3.0.2",
+                "ext-json": "*",
+                "justinrainbow/json-schema": "^4.0.0 || ^5.0.0",
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "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",
+                "infection/infection": "~0.13.6",
+                "jangregor/phpstan-prophecy": "~0.6.2",
+                "phpstan/extension-installer": "^1.0.4",
+                "phpstan/phpstan": "~0.12.18",
+                "phpstan/phpstan-deprecation-rules": "~0.12.2",
+                "phpstan/phpstan-phpunit": "~0.12.8",
+                "phpstan/phpstan-strict-rules": "~0.12.2",
+                "phpunit/phpunit": "^7.5.20",
+                "psalm/plugin-phpunit": "~0.10.0",
+                "vimeo/psalm": "^3.11.2"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Ergebnis\\Json\\Normalizer\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Andreas Möller",
+                    "email": "am@localheinz.com"
+                }
+            ],
+            "description": "Provides generic and vendor-specific normalizers for normalizing JSON documents.",
+            "homepage": "https://github.com/ergebnis/json-normalizer",
+            "keywords": [
+                "json",
+                "normalizer"
+            ],
+            "funding": [
+                {
+                    "url": "https://paypal.me/localheinz",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.amazon.de/hz/wishlist/ls/2NCHMSJ4BC1OW",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.buymeacoffee.com/localheinz",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/localheinz",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-04-19T12:30:41+00:00"
+        },
+        {
+            "name": "ergebnis/json-printer",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ergebnis/json-printer.git",
+                "reference": "c7985dc4879777f2e4ab689da25bdd49f59dd2cb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ergebnis/json-printer/zipball/c7985dc4879777f2e4ab689da25bdd49f59dd2cb",
+                "reference": "c7985dc4879777f2e4ab689da25bdd49f59dd2cb",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "ext-mbstring": "*",
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "ergebnis/php-cs-fixer-config": "~1.1.1",
+                "ergebnis/phpstan-rules": "~0.14.1",
+                "ergebnis/test-util": "~0.9.0",
+                "infection/infection": "~0.13.6",
+                "phpbench/phpbench": "~0.16.10",
+                "phpstan/extension-installer": "^1.0.3",
+                "phpstan/phpstan": "~0.11.19",
+                "phpstan/phpstan-deprecation-rules": "~0.11.2",
+                "phpstan/phpstan-strict-rules": "~0.11.1",
+                "phpunit/phpunit": "^7.5.18"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Ergebnis\\Json\\Printer\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Andreas Möller",
+                    "email": "am@localheinz.com"
+                }
+            ],
+            "description": "Provides a JSON printer, allowing for flexible indentation.",
+            "homepage": "https://github.com/ergebnis/json-printer",
+            "keywords": [
+                "formatter",
+                "json",
+                "printer"
+            ],
+            "time": "2019-12-19T14:42:54+00:00"
+        },
+        {
+            "name": "justinrainbow/json-schema",
+            "version": "5.2.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/justinrainbow/json-schema.git",
+                "reference": "2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b",
+                "reference": "2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.2.20||~2.15.1",
+                "json-schema/json-schema-test-suite": "1.2.0",
+                "phpunit/phpunit": "^4.8.35"
+            },
+            "bin": [
+                "bin/validate-json"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "JsonSchema\\": "src/JsonSchema/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bruno Prieto Reis",
+                    "email": "bruno.p.reis@gmail.com"
+                },
+                {
+                    "name": "Justin Rainbow",
+                    "email": "justin.rainbow@gmail.com"
+                },
+                {
+                    "name": "Igor Wiedler",
+                    "email": "igor@wiedler.ch"
+                },
+                {
+                    "name": "Robert Schönthal",
+                    "email": "seroscho@googlemail.com"
+                }
+            ],
+            "description": "A library to validate a json schema.",
+            "homepage": "https://github.com/justinrainbow/json-schema",
+            "keywords": [
+                "json",
+                "schema"
+            ],
+            "time": "2020-05-27T16:41:55+00:00"
+        },
+        {
+            "name": "localheinz/diff",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/localheinz/diff.git",
+                "reference": "bd5661db4bbed26c6f25df8851fd9f4b424a356e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/localheinz/diff/zipball/bd5661db4bbed26c6f25df8851fd9f4b424a356e",
+                "reference": "bd5661db4bbed26c6f25df8851fd9f4b424a356e",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.5 || ^8.0",
+                "symfony/process": "^2 || ^3.3 || ^4"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Kore Nordmann",
+                    "email": "mail@kore-nordmann.de"
+                }
+            ],
+            "description": "Fork of sebastian/diff for use with ergebnis/composer-normalize",
+            "homepage": "https://github.com/sebastianbergmann/diff",
+            "keywords": [
+                "diff",
+                "udiff",
+                "unidiff",
+                "unified diff"
+            ],
+            "time": "2019-12-17T07:42:37+00:00"
+        },
         {
             "name": "phpdocumentor/reflection-docblock",
             "version": "2.0.5",