diff --git a/src/index.ts b/src/index.ts
index 3c5b9d2..539b465 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -84,9 +84,7 @@ export default async function bundle(files: string[], options: any = {}) {
   let resolvedJsons;
 
   if (majorVersion === 3) {
-    resolvedJsons = await resolveV3Document(parsedJsons, {
-      referenceIntoComponents: options.referenceIntoComponents
-    });
+    resolvedJsons = await resolveV3Document(parsedJsons);
   } else {
     /**
      * Bundle all external references for each file.
diff --git a/src/v3/parser.ts b/src/v3/parser.ts
index c7f92e7..9a6b2aa 100644
--- a/src/v3/parser.ts
+++ b/src/v3/parser.ts
@@ -72,7 +72,7 @@ async function resolveExternalRefsForOperation(parsedJSON: any, $refs: $Refs) {
         if (isExternalReference(ref)) {
           const value: any = $refs.get(ref);
           const component = new ExternalComponents(ref, value);
-          parent[parentProperty]['$ref'] = `#/components/messages/${component.getKey()}`;
+          parent[String(parentProperty)]['$ref'] = `#/components/messages/${component.getKey()}`;
         }
       });
     }
@@ -95,7 +95,7 @@ export async function parse(JSONSchema: any) {
   }
 }
 
-export async function resolveV3Document(asyncapiDocuments: AsyncAPIObject[], options: any) {
+export async function resolveV3Document(asyncapiDocuments: AsyncAPIObject[]) {
   const docs = [];
   for (const asyncapiDocument of asyncapiDocuments) {
     await parse(asyncapiDocument);