diff --git a/app/controllers/health_monitor/health_controller.rb b/app/controllers/health_monitor/health_controller.rb
index f523d1a..4b157a8 100644
--- a/app/controllers/health_monitor/health_controller.rb
+++ b/app/controllers/health_monitor/health_controller.rb
@@ -43,7 +43,7 @@ def authenticate_with_basic_auth
     end
 
     def providers_params
-      params.except(:format).permit(providers: [])
+      params.except(:format, :subdomain).permit(providers: [])
     end
   end
 end