diff --git a/src/main/javascript/utils/utils.js b/src/main/javascript/utils/utils.js
index 46b3913b..8445f442 100644
--- a/src/main/javascript/utils/utils.js
+++ b/src/main/javascript/utils/utils.js
@@ -20,6 +20,7 @@ window.SwaggerUi.utils = {
                     auths[key] = auths[key] || {};
                     if (auths[key].type === 'oauth2') {
                         singleOauth2Security[key] = Object.assign({}, auths[key]);
+                        singleOauth2Security[key].scopes = Object.assign({}, auths[key].scopes);
                         for (var i in singleOauth2Security[key].scopes) {
                             if (item[key].indexOf(i) < 0) {
                                 delete singleOauth2Security[key].scopes[i];