diff --git a/Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj b/Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj
index b14ffc51c..49c3ea4bf 100644
--- a/Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj
+++ b/Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj
@@ -20,9 +20,9 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Ardalis.GuardClauses" Version="3.3.0" />
+		<PackageReference Include="Ardalis.GuardClauses" Version="4.0.1" />
 		<PackageReference Include="CommandLiners.MonoOptions" Version="1.0.36" />
-		<PackageReference Include="HtmlAgilityPack" Version="1.11.37" />
+		<PackageReference Include="HtmlAgilityPack" Version="1.11.40" />
 		<PackageReference Include="MailKit" Version="2.15.0" />
 		<PackageReference Include="Microsoft.AspNetCore.Hosting.WindowsServices" Version="3.1.20" />
 		<PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.1.0" />