diff --git a/SendEmails/MailKitDemo/MailKitDemo.csproj b/SendEmails/MailKitDemo/MailKitDemo.csproj
index e9d49c7..8bee03d 100644
--- a/SendEmails/MailKitDemo/MailKitDemo.csproj
+++ b/SendEmails/MailKitDemo/MailKitDemo.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MailKit" Version="2.15.0" />
+    <PackageReference Include="MailKit" Version="4.16.0" />
     <PackageReference Include="netDumbster" Version="2.0.0.8" />
     <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />