diff --git a/backend/src/ExoAuth.Application/ExoAuth.Application.csproj b/backend/src/ExoAuth.Application/ExoAuth.Application.csproj
index 8a1b1f7..71be967 100644
--- a/backend/src/ExoAuth.Application/ExoAuth.Application.csproj
+++ b/backend/src/ExoAuth.Application/ExoAuth.Application.csproj
@@ -5,7 +5,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Fido2.Models" Version="3.0.1" />
+    <PackageReference Include="Fido2.Models" Version="4.0.0" />
     <PackageReference Include="FluentValidation" Version="12.1.1" />
     <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="12.1.1" />
     <PackageReference Include="Mediator.Abstractions" Version="3.0.1" />