diff --git a/config-schema.json b/config-schema.json
index 1dc358baa..5886e07f9 100644
--- a/config-schema.json
+++ b/config-schema.json
@@ -12,6 +12,15 @@
     }
   ],
   "definitions": {
+    "ISchema": {
+      "title": "ISchema",
+      "description": "Additional Schema properties (mostly used for schema url)",
+      "type": "object",
+      "properties": {
+        "headers": {}
+      },
+      "additionalProperties": {},
+    },
     "IExtensions": {
       "additionalProperties": {},
       "description": "Configuration of each used extension",
@@ -77,7 +86,18 @@
             },
             {
               "type": "string"
-            }
+            },
+            {
+              "$ref": "#/definitions/ISchema",
+              "title": "schema"
+            },
+            {
+              "items": {
+                "$ref": "#/definitions/ISchema",
+                "title": "schema"
+              },
+              "type": "array"
+            },
           ],
           "title": "schema"
         }