diff --git a/PrototypWPFHAG/PrototypWPFHAG.csproj b/PrototypWPFHAG/PrototypWPFHAG.csproj
index 47c9be0..24d5e06 100644
--- a/PrototypWPFHAG/PrototypWPFHAG.csproj
+++ b/PrototypWPFHAG/PrototypWPFHAG.csproj
@@ -20,6 +20,7 @@
 
   <ItemGroup>
     <PackageReference Include="MahApps.Metro" Version="2.4.10" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.Negotiate" Version="9.0.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Npgsql" Version="9.0.3" />
     <PackageReference Include="PdfPig" Version="0.1.9" />