diff --git a/themes/src/main/resources/theme/base/admin/resources/js/app.js b/themes/src/main/resources/theme/base/admin/resources/js/app.js
index 405a70b469c..eab16462ca9 100755
--- a/themes/src/main/resources/theme/base/admin/resources/js/app.js
+++ b/themes/src/main/resources/theme/base/admin/resources/js/app.js
@@ -58,7 +58,7 @@ angular.element(document).ready(function () {
         location.reload();
     }
 
-    keycloakAuth.init({ onLoad: 'login-required' }).success(function () {
+    keycloakAuth.init({ onLoad: 'login-required', pkceMethod: 'S256' }).success(function () {
         auth.authz = keycloakAuth;
 
         if (auth.authz.idTokenParsed.locale) {