diff --git a/composer.json b/composer.json
index 572ddc5e..b346c800 100644
--- a/composer.json
+++ b/composer.json
@@ -21,6 +21,7 @@
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     "ergebnis/json-normalizer": "~0.12.0",
     "ergebnis/json-printer": "^3.0.2",
+    "justinrainbow/json-schema": "^5.2.10",
     "localheinz/diff": "^1.0.1"
   },
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diff --git a/composer.lock b/composer.lock
index 7a4d9d04..e48c8a8c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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-    "content-hash": "1d6a7a58d14055b3be02e93a9a06352b",
+    "content-hash": "fab5e4d27c4d7d0d2d90415372c0d3ea",
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             "name": "ergebnis/json-normalizer",
@@ -64,24 +64,6 @@
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-                    "url": "https://paypal.me/localheinz",
-                    "type": "custom"
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@@ -142,16 +124,16 @@
         },
         {
             "name": "justinrainbow/json-schema",
-            "version": "5.2.9",
+            "version": "5.2.10",
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                 "url": "https://github.com/justinrainbow/json-schema.git",
-                "reference": "44c6787311242a979fa15c704327c20e7221a0e4"
+                "reference": "2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b"
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             "dist": {
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-                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/44c6787311242a979fa15c704327c20e7221a0e4",
-                "reference": "44c6787311242a979fa15c704327c20e7221a0e4",
+                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b",
+                "reference": "2ba9c8c862ecd5510ed16c6340aa9f6eadb4f31b",
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@@ -204,7 +186,7 @@
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-            "time": "2019-09-25T14:49:45+00:00"
+            "time": "2020-05-27T16:41:55+00:00"
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             "name": "localheinz/diff",
@@ -286,7 +268,7 @@
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+                    "dev-main": "1.x-dev"
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@@ -313,16 +295,6 @@
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@@ -500,7 +472,7 @@
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+                    "dev-main": "2.x-dev"
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@@ -536,16 +508,6 @@
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@@ -571,7 +533,7 @@
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+                    "dev-main": "1.x-dev"
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@@ -650,12 +612,6 @@
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@@ -687,7 +643,7 @@
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+                    "dev-main": "1.2.x-dev"
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@@ -834,24 +790,6 @@
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-                    "type": "custom"
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@@ -912,20 +850,6 @@
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@@ -953,7 +877,7 @@
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@@ -1036,16 +960,6 @@
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@@ -1124,7 +1038,7 @@
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@@ -1171,7 +1085,7 @@
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@@ -1273,7 +1187,7 @@
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@@ -1331,7 +1245,7 @@
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+                    "dev-main": "4.x-dev"
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@@ -1380,7 +1294,7 @@
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+                    "dev-main": "1.x-dev"
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@@ -1429,7 +1343,7 @@
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+                    "dev-main": "1.10.x-dev"
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@@ -1596,7 +1510,7 @@
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+                    "dev-main": "0.12-dev"
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@@ -1651,7 +1565,7 @@
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+                    "dev-main": "0.12-dev"
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@@ -1703,7 +1617,7 @@
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+                    "dev-main": "0.12-dev"
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@@ -1758,7 +1672,7 @@
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@@ -1809,7 +1723,7 @@
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+                    "dev-main": "2.0.x-dev"
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@@ -1900,7 +1814,7 @@
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+                    "dev-main": "2.1-dev"
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@@ -1950,7 +1864,7 @@
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+                    "dev-main": "3.1-dev"
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@@ -2031,7 +1945,7 @@
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+                    "dev-main": "7.5-dev"
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@@ -2079,7 +1993,7 @@
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+                    "dev-main": "1.0.x-dev"
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@@ -2128,7 +2042,7 @@
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+                    "dev-main": "1.1.x-dev"
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@@ -2224,7 +2138,7 @@
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+                    "dev-main": "1.0.x-dev"
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@@ -2271,7 +2185,7 @@
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+                    "dev-main": "3.0-dev"
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@@ -2334,7 +2248,7 @@
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+                    "dev-main": "3.0-dev"
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@@ -2392,7 +2306,7 @@
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+                    "dev-main": "4.2-dev"
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@@ -2444,7 +2358,7 @@
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+                    "dev-main": "3.1.x-dev"
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@@ -2512,7 +2426,7 @@
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+                    "dev-main": "2.0-dev"
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@@ -2562,7 +2476,7 @@
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@@ -2607,7 +2521,7 @@
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@@ -2652,7 +2566,7 @@
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@@ -2702,7 +2616,7 @@
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@@ -2744,7 +2658,7 @@
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@@ -2836,7 +2750,7 @@
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@@ -2907,7 +2821,7 @@
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+                    "dev-main": "4.4-dev"
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@@ -2934,20 +2848,6 @@
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@@ -3034,7 +2934,7 @@
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+                    "dev-main": "4.4-dev"
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@@ -3061,20 +2961,6 @@
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@@ -3100,7 +2986,7 @@
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@@ -3133,20 +3019,6 @@
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@@ -3172,7 +3044,7 @@
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@@ -3206,20 +3078,6 @@
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@@ -3242,7 +3100,7 @@
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@@ -3278,20 +3136,6 @@
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@@ -3314,7 +3158,7 @@
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@@ -3341,20 +3185,6 @@
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@@ -3381,7 +3211,7 @@
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