diff --git a/src/core/index.js b/src/core/index.js
index 6cb29a30142..bf684426ce0 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -36,7 +36,7 @@ export default function SwaggerUI(opts) {
     maxDisplayedTags: null,
     filter: null,
     validatorUrl: "https://validator.swagger.io/validator",
-    oauth2RedirectUrl: `${window.location.protocol}//${window.location.host}${window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/'))}/oauth2-redirect.html`,
+    oauth2RedirectUrl: `${window.location.protocol}//${window.location.host}${window.location.pathname.substring(0, window.location.pathname.lastIndexOf("/"))}/oauth2-redirect.html`,
     persistAuthorization: false,
     configs: {},
     custom: {},