diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1d48d9..e81b130 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## v5.1.0
+
+### Changed
+
+- Make requirement of `mll-lab/graphql-php-scalars` optional
+
 ## v5.0.0
 
 ### Added
diff --git a/composer.json b/composer.json
index 6549fc0..7a48052 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,6 @@
   "require": {
     "php": "^7.4 || ^8",
     "illuminate/support": "^7 || ^8 || ^9 || ^10",
-    "mll-lab/graphql-php-scalars": "^6",
     "myclabs/php-enum": "^1.7",
     "thecodingmachine/safe": "^1"
   },
@@ -25,6 +24,7 @@
     "ergebnis/composer-normalize": "^2",
     "infection/infection": "~0.25",
     "jangregor/phpstan-prophecy": "^1",
+    "mll-lab/graphql-php-scalars": "^6",
     "mll-lab/php-cs-fixer-config": "^4.3",
     "mll-lab/rector-config": "^2",
     "nunomaduro/larastan": "^1 || ^2",
@@ -38,6 +38,9 @@
     "symfony/var-dumper": "^5 || ^6",
     "thecodingmachine/phpstan-safe-rule": "^1.1"
   },
+  "suggest": {
+    "mll-lab/graphql-php-scalars": "To use the provided scalar types for GraphQL servers, requires version ^6"
+  },
   "autoload": {
     "psr-4": {
       "Mll\\Microplate\\": "src/"
diff --git a/composer.lock b/composer.lock
index 8d05fdf..27a1d4a 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": "59c86e8662a1650ef8d2c9239cdc4d03",
+    "content-hash": "ca977eba17dd1bb68e79fd377fa92d6c",
     "packages": [
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             "name": "brick/math",
@@ -1245,68 +1245,6 @@
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             "time": "2022-04-17T13:12:02+00:00"
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-                "friendsofphp/php-cs-fixer": "3.4.*",
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-                "phpstan/phpstan": "^1",
-                "phpstan/phpstan-deprecation-rules": "^1",
-                "phpstan/phpstan-phpunit": "^1",
-                "phpstan/phpstan-strict-rules": "^1",
-                "phpunit/phpunit": "^9",
-                "symfony/var-dumper": "^5.4 || ^6",
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-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Benedikt Franke",
-                    "email": "benedikt@franke.tech"
-                }
-            ],
-            "description": "A collection of custom scalar types for usage with https://github.com/webonyx/graphql-php",
-            "keywords": [
-                "graphql",
-                "php"
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-                "source": "https://github.com/mll-lab/graphql-php-scalars/tree/v6.1.0"
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-            "time": "2023-02-24T08:21:51+00:00"
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@@ -2268,69 +2206,6 @@
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-            ],
-            "authors": [
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-                    "email": "sebastian@spatie.be",
-                    "homepage": "https://spatie.be",
-                    "role": "Developer"
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-            ],
-            "description": "A sane interface for php's built in preg_* functions",
-            "homepage": "https://github.com/spatie/regex",
-            "keywords": [
-                "expression",
-                "expressions",
-                "regex",
-                "regular",
-                "spatie"
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-            "support": {
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-                    "type": "github"
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-            "time": "2021-11-30T21:13:59+00:00"
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         {
             "name": "symfony/console",
             "version": "v6.2.7",
@@ -4933,79 +4808,6 @@
                 "source": "https://github.com/webmozarts/assert/tree/1.11.0"
             },
             "time": "2022-06-03T18:03:27+00:00"
-        },
-        {
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-            "version": "v15.2.4",
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-                "php": "^7.4 || ^8"
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-            "require-dev": {
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-                "mll-lab/php-cs-fixer-config": "^5.0",
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-                "symfony/polyfill-php81": "^1.23",
-                "symfony/var-exporter": "^5 || ^6",
-                "thecodingmachine/safe": "^1.3 || ^2"
-            },
-            "suggest": {
-                "amphp/http-server": "To leverage async resolving with webserver on AMPHP platform",
-                "psr/http-message": "To use standard GraphQL server",
-                "react/promise": "To leverage async resolving on React PHP platform"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "GraphQL\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
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-            "description": "A PHP port of GraphQL reference implementation",
-            "homepage": "https://github.com/webonyx/graphql-php",
-            "keywords": [
-                "api",
-                "graphql"
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-            "time": "2023-03-20T18:50:41+00:00"
         }
     ],
     "packages-dev": [
@@ -6595,6 +6397,68 @@
             ],
             "time": "2020-07-06T04:49:32+00:00"
         },
+        {
+            "name": "mll-lab/graphql-php-scalars",
+            "version": "v6.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/mll-lab/graphql-php-scalars.git",
+                "reference": "24a479797f65789e4b47b08f379ac7458a88cb08"
+            },
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+                "reference": "24a479797f65789e4b47b08f379ac7458a88cb08",
+                "shasum": ""
+            },
+            "require": {
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+                "ext-json": "*",
+                "php": "^8",
+                "spatie/regex": "^1.4 || ^2 || ^3",
+                "thecodingmachine/safe": "^1.3 || ^2",
+                "webonyx/graphql-php": "^15"
+            },
+            "require-dev": {
+                "ergebnis/composer-normalize": "^2.16",
+                "friendsofphp/php-cs-fixer": "3.4.*",
+                "mll-lab/php-cs-fixer-config": "^4.3",
+                "phpstan/extension-installer": "^1",
+                "phpstan/phpstan": "^1",
+                "phpstan/phpstan-deprecation-rules": "^1",
+                "phpstan/phpstan-phpunit": "^1",
+                "phpstan/phpstan-strict-rules": "^1",
+                "phpunit/phpunit": "^9",
+                "symfony/var-dumper": "^5.4 || ^6",
+                "thecodingmachine/phpstan-safe-rule": "^1.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "MLL\\GraphQLScalars\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Benedikt Franke",
+                    "email": "benedikt@franke.tech"
+                }
+            ],
+            "description": "A collection of custom scalar types for usage with https://github.com/webonyx/graphql-php",
+            "keywords": [
+                "graphql",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/mll-lab/graphql-php-scalars/issues",
+                "source": "https://github.com/mll-lab/graphql-php-scalars/tree/v6.1.0"
+            },
+            "time": "2023-02-24T08:21:51+00:00"
+        },
         {
             "name": "mll-lab/php-cs-fixer-config",
             "version": "v4.5.0",
@@ -7058,16 +6922,16 @@
         },
         {
             "name": "orchestra/testbench",
-            "version": "v8.0.10",
+            "version": "v8.0.11",
             "source": {
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                 "url": "https://github.com/orchestral/testbench.git",
-                "reference": "c02190defc738fbe20d147a6de48738aed113c19"
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@@ -7078,7 +6942,7 @@
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                 "php": "^8.1",
                 "phpunit/phpunit": "^9.6 || ^10.0.7",
-                "spatie/laravel-ray": "^1.32",
+                "spatie/laravel-ray": "^1.32.4",
                 "symfony/process": "^6.2",
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@@ -7107,22 +6971,22 @@
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-                "source": "https://github.com/orchestral/testbench/tree/v8.0.10"
+                "source": "https://github.com/orchestral/testbench/tree/v8.0.11"
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-            "time": "2023-03-18T13:08:38+00:00"
+            "time": "2023-03-23T09:39:48+00:00"
         },
         {
             "name": "orchestra/testbench-core",
-            "version": "v8.1.1",
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@@ -7196,7 +7060,7 @@
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@@ -8327,16 +8191,16 @@
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-            "version": "0.15.21",
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@@ -8376,7 +8240,7 @@
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-                "source": "https://github.com/rectorphp/rector/tree/0.15.21"
+                "source": "https://github.com/rectorphp/rector/tree/0.15.23"
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@@ -8384,7 +8248,7 @@
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-            "time": "2023-03-06T11:44:29+00:00"
+            "time": "2023-03-22T15:22:45+00:00"
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@@ -9601,16 +9465,16 @@
         },
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                 "url": "https://github.com/spatie/laravel-ray.git",
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@@ -9670,7 +9534,7 @@
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@@ -9682,7 +9546,7 @@
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@@ -9810,6 +9674,69 @@
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+        {
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+            "version": "3.1.1",
+            "source": {
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+                "url": "https://github.com/spatie/regex.git",
+                "reference": "d543de2019a0068e7b80da0ba24f1c51c7469303"
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+            "autoload": {
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+                    "Spatie\\Regex\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian De Deyne",
+                    "email": "sebastian@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A sane interface for php's built in preg_* functions",
+            "homepage": "https://github.com/spatie/regex",
+            "keywords": [
+                "expression",
+                "expressions",
+                "regex",
+                "regular",
+                "spatie"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/regex/issues",
+                "source": "https://github.com/spatie/regex/tree/3.1.1"
+            },
+            "funding": [
+                {
+                    "url": "https://spatie.be/open-source/support-us",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-11-30T21:13:59+00:00"
+        },
         {
             "name": "symfony/filesystem",
             "version": "v6.2.7",
@@ -10396,6 +10323,79 @@
             "abandoned": "symfony/filesystem",
             "time": "2015-12-17T08:42:14+00:00"
         },
+        {
+            "name": "webonyx/graphql-php",
+            "version": "v15.2.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webonyx/graphql-php.git",
+                "reference": "ac27a8692622ac13e72a6fe354027cc81ef31a6e"
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+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webonyx/graphql-php/zipball/ac27a8692622ac13e72a6fe354027cc81ef31a6e",
+                "reference": "ac27a8692622ac13e72a6fe354027cc81ef31a6e",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "ext-mbstring": "*",
+                "php": "^7.4 || ^8"
+            },
+            "require-dev": {
+                "amphp/amp": "^2.6",
+                "amphp/http-server": "^2.1",
+                "dms/phpunit-arraysubset-asserts": "^0.4",
+                "ergebnis/composer-normalize": "^2.28",
+                "mll-lab/php-cs-fixer-config": "^5.0",
+                "nyholm/psr7": "^1.5",
+                "phpbench/phpbench": "^1.2",
+                "phpstan/extension-installer": "^1.1",
+                "phpstan/phpstan": "1.10.6",
+                "phpstan/phpstan-phpunit": "1.3.10",
+                "phpstan/phpstan-strict-rules": "1.5.0",
+                "phpunit/phpunit": "^9.5",
+                "psr/http-message": "^1",
+                "react/http": "^1.6",
+                "react/promise": "^2.9",
+                "rector/rector": "^0.15.18",
+                "symfony/polyfill-php81": "^1.23",
+                "symfony/var-exporter": "^5 || ^6",
+                "thecodingmachine/safe": "^1.3 || ^2"
+            },
+            "suggest": {
+                "amphp/http-server": "To leverage async resolving with webserver on AMPHP platform",
+                "psr/http-message": "To use standard GraphQL server",
+                "react/promise": "To leverage async resolving on React PHP platform"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "GraphQL\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "A PHP port of GraphQL reference implementation",
+            "homepage": "https://github.com/webonyx/graphql-php",
+            "keywords": [
+                "api",
+                "graphql"
+            ],
+            "support": {
+                "issues": "https://github.com/webonyx/graphql-php/issues",
+                "source": "https://github.com/webonyx/graphql-php/tree/v15.2.4"
+            },
+            "funding": [
+                {
+                    "url": "https://opencollective.com/webonyx-graphql-php",
+                    "type": "open_collective"
+                }
+            ],
+            "time": "2023-03-20T18:50:41+00:00"
+        },
         {
             "name": "zbateson/mail-mime-parser",
             "version": "2.4.0",