diff --git a/composer.lock b/composer.lock
index 9ed6128219..91cc7e3300 100644
--- a/composer.lock
+++ b/composer.lock
@@ -3422,6 +3422,72 @@
             ],
             "time": "2016-10-04T09:27:04+00:00"
         },
+        {
+            "name": "justinrainbow/json-schema",
+            "version": "5.2.8",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/justinrainbow/json-schema.git",
+                "reference": "dcb6e1006bb5fd1e392b4daa68932880f37550d4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/dcb6e1006bb5fd1e392b4daa68932880f37550d4",
+                "reference": "dcb6e1006bb5fd1e392b4daa68932880f37550d4",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "~2.2.20",
+                "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": "2019-01-14T23:55:14+00:00"
+        },
         {
             "name": "mikey179/vfsStream",
             "version": "v1.6.5",
@@ -3954,6 +4020,7 @@
                 "mock",
                 "xunit"
             ],
+            "abandoned": true,
             "time": "2015-10-02T06:51:40+00:00"
         },
         {
diff --git a/core/composer.json b/core/composer.json
index 7964dee573..f645d944a5 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -58,12 +58,13 @@
         "drupal/coder": "^8.2.12",
         "jcalderonzumba/gastonjs": "^1.0.2",
         "jcalderonzumba/mink-phantomjs-driver": "^0.3.1",
+        "justinrainbow/json-schema": "^5.2",
         "mikey179/vfsStream": "^1.2",
-        "phpunit/phpunit": "^4.8.35 || ^6.5",
         "phpspec/prophecy": "^1.7",
+        "phpunit/phpunit": "^4.8.35 || ^6.5",
         "symfony/css-selector": "^3.4.0",
-        "symfony/phpunit-bridge": "^3.4.3",
-        "symfony/debug": "^3.4.0"
+        "symfony/debug": "^3.4.0",
+        "symfony/phpunit-bridge": "^3.4.3"
     },
     "replace": {
         "drupal/action": "self.version",