diff --git a/definitions/3.0.0/parameter.json b/definitions/3.0.0/parameter.json
index f6c81ddd..f483a9c9 100644
--- a/definitions/3.0.0/parameter.json
+++ b/definitions/3.0.0/parameter.json
@@ -10,16 +10,28 @@
       "type": "string",
       "description": "A brief description of the parameter. This could contain examples of use. GitHub Flavored Markdown is allowed."
     },
-    "schema": {
-      "$ref": "http://asyncapi.com/definitions/3.0.0/schema.json"
+    "enum": {
+      "description": "A list of allowed values for the parameter.",
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
+    "default": {
+      "description": "The default value to use for the parameter.",
+      "type": "string"
+    },
+    "examples": {
+      "description": "List of example values to use for the parameter.",
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
     },
     "location": {
       "type": "string",
       "description": "A runtime expression that specifies the location of the parameter value",
       "pattern": "^\\$message\\.(header|payload)#(\\/(([^\\/~])|(~[01]))*)*"
-    },
-    "$ref": {
-      "$ref": "http://asyncapi.com/definitions/3.0.0/ReferenceObject.json"
     }
   },
   "$schema": "http://json-schema.org/draft-07/schema#",
diff --git a/test/docs/3.0.0/streetlights-all.json b/test/docs/3.0.0/streetlights-all.json
index aabad861..c3a24f83 100644
--- a/test/docs/3.0.0/streetlights-all.json
+++ b/test/docs/3.0.0/streetlights-all.json
@@ -7,7 +7,21 @@
     },
     "channels": {
         "UserSignedUpChannel": {
-            "address": "user/signedup",
+            "address": "user/signedup/{test_param}",
+            "parameters": {
+                "test_param": {
+                    "enum": [
+                        "test"
+                    ],
+                    "default": "test",
+                    "description": "Just a test description",
+                    "examples": [
+                        "test"
+                    ],
+                    "location": "$message.payload#",
+                    "x-custom-extension": "test"
+                }
+            },
             "messages": {
                 "UserSignedUp": {
                     "$ref": "#/components/messages/UserSignedUp"