diff --git a/backend/src/Squidex.Domain.Apps.Entities/Squidex.Domain.Apps.Entities.csproj b/backend/src/Squidex.Domain.Apps.Entities/Squidex.Domain.Apps.Entities.csproj
index ab0ec9cf1..3d54dd808 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Squidex.Domain.Apps.Entities.csproj
+++ b/backend/src/Squidex.Domain.Apps.Entities/Squidex.Domain.Apps.Entities.csproj
@@ -31,7 +31,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.Orleans.Core" Version="3.3.0" />
-    <PackageReference Include="Notifo.SDK" Version="1.0.0-alpha12" />
+    <PackageReference Include="Notifo.SDK" Version="1.0.0-alpha9" />
     <PackageReference Include="RefactoringEssentials" Version="5.6.0" PrivateAssets="all" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="all" />
     <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />
diff --git a/backend/tests/Squidex.Domain.Apps.Core.Tests/Model/Apps/AppClientsTests.cs b/backend/tests/Squidex.Domain.Apps.Core.Tests/Model/Apps/AppClientsTests.cs
index fd8df1fa4..318548338 100644
--- a/backend/tests/Squidex.Domain.Apps.Core.Tests/Model/Apps/AppClientsTests.cs
+++ b/backend/tests/Squidex.Domain.Apps.Core.Tests/Model/Apps/AppClientsTests.cs
@@ -37,7 +37,7 @@ namespace Squidex.Domain.Apps.Core.Model.Apps
         [Fact]
         public void Should_do_nothing_if_assigning_client_with_same_id()
         {
-            var clients_1 = clients_0.Add("2", "my-secret");
+            var clients_1 = clients_0.Add("1", "my-secret");
 
             Assert.Same(clients_0, clients_1);
         }