diff --git a/src/IdentityServer4/Extensions/PrincipalExtensions.cs b/src/IdentityServer4/Extensions/PrincipalExtensions.cs
index 2ca528c423..8cff77eed1 100644
--- a/src/IdentityServer4/Extensions/PrincipalExtensions.cs
+++ b/src/IdentityServer4/Extensions/PrincipalExtensions.cs
@@ -24,7 +24,7 @@ public static class PrincipalExtensions
         [DebuggerStepThrough]
         public static DateTime GetAuthenticationTime(this IPrincipal principal)
         {
-            return principal.GetAuthenticationTimeEpoch().ToDateTimeFromEpoch();
+            return ((int)principal.GetAuthenticationTimeEpoch()).ToDateTimeFromEpoch();
         }
 
         /// <summary>
diff --git a/src/IdentityServer4/IdentityServer4.csproj b/src/IdentityServer4/IdentityServer4.csproj
index a7ab61f8f5..91befc919e 100644
--- a/src/IdentityServer4/IdentityServer4.csproj
+++ b/src/IdentityServer4/IdentityServer4.csproj
@@ -24,8 +24,8 @@
     <PackageReference Include="Microsoft.Extensions.Logging" Version="2.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="2.0.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="5.1.5" />
-    <PackageReference Include="IdentityModel" Version="3.0.0-aberfeldy" />
+    <PackageReference Include="IdentityModel" Version="3.0.0" />
     <PackageReference Include="System.Security.Cryptography.Cng" Version="4.4.0" />
-    <PackageReference Include="SourceLink.Embed.AllSourceFiles" Version="2.6.1" PrivateAssets="all" />
+    <PackageReference Include="SourceLink.Embed.AllSourceFiles" Version="2.7.4" PrivateAssets="all" />
   </ItemGroup>
 </Project>