diff --git a/lib/index.hbs b/lib/index.hbs
index 97365a7..10332d5 100644
--- a/lib/index.hbs
+++ b/lib/index.hbs
@@ -5,7 +5,7 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <title>{{title}}</title>
   <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700|Source+Code+Pro:300,600|Titillium+Web:400,600,700" rel="stylesheet">
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/{{swaggerVersion}}/swagger-ui.min.css">
+  <link rel="stylesheet" href="{{swaggerCdnUrl}}/{{swaggerVersion}}/swagger-ui.min.css">
   <link rel="icon" type="image/png" href="{{favicon}}" />
   <style>
     html
@@ -70,8 +70,8 @@
 
 <div id="swagger-ui"></div>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/{{swaggerVersion}}/swagger-ui-bundle.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/{{swaggerVersion}}/swagger-ui-standalone-preset.js"></script>
+<script src="{{swaggerCdnUrl}}/{{swaggerVersion}}/swagger-ui-bundle.js"></script>
+<script src="{{swaggerCdnUrl}}/{{swaggerVersion}}/swagger-ui-standalone-preset.js"></script>
 <script>
 function HideTopbarPlugin() {
   // this plugin overrides the Topbar component to return nothing
diff --git a/lib/index.ts b/lib/index.ts
index 6e7ce46..0867805 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -37,6 +37,7 @@ export interface KoaSwaggerUiOptions {
   oauthOptions: boolean | any;
   swaggerOptions: SwaggerOptions;
   swaggerVersion: string;
+  swaggerCdnUrl?: string;
   routePrefix: string | false;
   specPrefix: string;
   exposeSpec: boolean;
@@ -56,6 +57,7 @@ const defaultOptions: KoaSwaggerUiOptions = {
   routePrefix: '/docs',
   specPrefix: '/docs/spec',
   swaggerVersion: '',
+  swaggerCdnUrl: 'https://cdnjs.cloudflare.com/ajax/libs/swagger-ui',
   exposeSpec: false,
   hideTopbar: false,
   favicon: '/favicon.png',