diff --git a/admin/src/config/schema.js b/admin/src/config/schema.js
index ecf134a1a..88847f347 100644
--- a/admin/src/config/schema.js
+++ b/admin/src/config/schema.js
@@ -20,15 +20,10 @@ module.exports = Joi.object({
   DEBUG,
   GRAPHQL_URI,
   HUMHUB_ACTIVE,
-  // HUMHUB_API_URL,
+  HUMHUB_API_URL,
   NODE_ENV,
   PRODUCTION,
 
-  HUMHUB_API_URL: Joi.string()
-    .uri({ scheme: ['http', 'https'] })
-    .when('HUMHUB_ACTIVE', { is: true, then: Joi.required(), otherwise: Joi.optional() })
-    .description('The API URL for HumHub integration'),
-
   ADMIN_HOSTING: Joi.string()
     .valid('nodejs', 'nginx')
     .description('set to `nodejs` if admin is hosted by vite with a own nodejs instance')