diff --git a/types/index.d.ts b/types/index.d.ts
index 9f4645f..0546135 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -8,11 +8,7 @@ declare namespace SerializerSelector {
     options?: Options
   ) => SerializerCompiler
 
-  export type SerializerCompiler = (
-    externalSchemas?: unknown,
-    options?: Options
-  ) => Serializer
-
+  export type SerializerCompiler = (routeDef: RouteDefinition) => Serializer
   export type Serializer = (doc: any) => string
 
   export type RouteDefinition = {
diff --git a/types/index.test-d.ts b/types/index.test-d.ts
index 641c476..018759a 100644
--- a/types/index.test-d.ts
+++ b/types/index.test-d.ts
@@ -37,7 +37,7 @@ import SerializerSelector, {
   expectType<SerializerFactory>(factory)
   const compiler = factory(externalSchemas1, {})
   expectType<SerializerCompiler>(compiler)
-  const serializeFunc = compiler({ schema: sampleSchema })
+  const serializeFunc = compiler({ schema: sampleSchema, method: '', url: '', httpStatus: '' })
   expectType<Serializer>(serializeFunc)
 
   expectType<string>(serializeFunc({ name: 'hello' }))
@@ -86,6 +86,9 @@ expectType<SerializerFactory>(writer)
   }
 
   const endpointSchema = {
+    method: '',
+    url: '',
+    httpStatus: '',
     schema: {
       $id: 'urn:schema:endpoint',
       $ref: 'urn:schema:ref'