diff --git a/Client/Startup/ClientStartup.cs b/Client/Startup/ClientStartup.cs
index 5fb721b..0ad161d 100644
--- a/Client/Startup/ClientStartup.cs
+++ b/Client/Startup/ClientStartup.cs
@@ -1,5 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using Oqtane.Services;
+using System.Linq;
 using SZUAbsolventenverein.Module.EventRegistration.Services;
 
 namespace SZUAbsolventenverein.Module.EventRegistration.Startup
@@ -8,7 +9,10 @@ namespace SZUAbsolventenverein.Module.EventRegistration.Startup
     {
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddScoped<IEventRegistrationService, EventRegistrationService>();
+            if (!services.Any(s => s.ServiceType == typeof(IEventRegistrationService)))
+            {
+                services.AddScoped<IEventRegistrationService, EventRegistrationService>();
+            }
         }
     }
 }