diff --git a/frontend/shells/meldestelle-portal/src/jsMain/resources/index.html b/frontend/shells/meldestelle-portal/src/jsMain/resources/index.html
index 0641bc83..b59b54cd 100644
--- a/frontend/shells/meldestelle-portal/src/jsMain/resources/index.html
+++ b/frontend/shells/meldestelle-portal/src/jsMain/resources/index.html
@@ -30,7 +30,7 @@
       const kcOverride = params.get('keycloakUrl');
       globalThis.KEYCLOAK_URL = kcOverride
         ? kcOverride.replace(/\/$/, '')
-        : 'http://' + window.location.hostname + ':8180';
+        : 'https://' + window.location.hostname + ':8180';
 
     } catch (e) {
       globalThis.API_BASE_URL = 'http://localhost:8081';