diff --git a/index.d.ts b/index.d.ts
index f7a11a1..6359d23 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -102,10 +102,12 @@ interface Servers {
 }
 
 interface Options {
+  openapi?: string;
   info: InfoObject;
   baseDir: string;
   filesPattern: string | string[];
   security?: Security;
+  jsonSchemaDialect?: string;
   servers?: string[] | Servers[];
   exposeSwaggerUI?: boolean;
   swaggerUIPath?: string;
diff --git a/processSwagger.js b/processSwagger.js
index f441bd1..4f33772 100644
--- a/processSwagger.js
+++ b/processSwagger.js
@@ -14,10 +14,11 @@ const defaultLogger = () => null;
 
 const processSwagger = (options, logger = defaultLogger) => {
   let swaggerObject = {
-    openapi: '3.0.0',
+    openapi: options.openapi || '3.0.0',
     info: options.info,
     servers: options.servers,
     security: options.security,
+    jsonSchemaDialect: options.jsonSchemaDialect || 'https://json-schema.org/draft/2019-09/schema'
   };
 
   swaggerObject = getBasicInfo(swaggerObject);