feat: allow configuring openapi version

src/index.ts

@@ -22,6 +22,7 @@ export const swagger = async <Path extends string = '/swagger'>(
 		scalarCDN = '',
 		scalarConfig = {},
 		documentation = {},
+		openapi = '3.0.3',
 		version = '5.9.0',
 		excludeStaticFile = true,
 		path = '/swagger' as Path,
@@ -37,6 +38,7 @@ export const swagger = async <Path extends string = '/swagger'>(
 		scalarCDN: '',
 		scalarConfig: {},
 		documentation: {},
+		openapi: '3.0.3',
 		version: '5.9.0',
 		excludeStaticFile: true,
 		path: '/swagger' as Path,
@@ -152,7 +154,7 @@ export const swagger = async <Path extends string = '/swagger'>(
 		}
 
 		return {
-			openapi: '3.0.3',
+			openapi: openapi,
 			...{
 				...documentation,
 				tags: documentation.tags?.filter(

src/types.ts

@@ -47,6 +47,12 @@ export interface ElysiaSwaggerConfig<Path extends string = '/swagger'> {
      * @see https://github.com/scalar/scalar/blob/main/documentation/configuration.md
      */
     scalarConfig?: ReferenceConfiguration
+    /**
+     * OpenAPI version to be used
+     *
+     * @default 3.0.3
+     */
+    openapi?: string;
     /**
      * Version to use for swagger cdn bundle
      *

test/index.test.ts

@@ -139,6 +139,19 @@ describe('Swagger', () => {
 		expect(res.trim().includes(expected.trim())).toBe(true)
 	})
 
+	it('OpenAPI version', async () => {
+		const app = new Elysia().use(
+			swagger({
+				openapi: '3.1.0'
+			})
+		)
+
+		await app.modules
+
+		const res = await app.handle(req('/swagger/json')).then((x) => x.json())
+		expect(res.openapi).toBe('3.1.0')
+	})
+
 	it('should not return content response when using Void type', async () => {
 		const app = new Elysia().use(swagger()).get('/void', () => {}, {
 			response: {