diff --git a/MailKit/MailKitLite.csproj b/MailKit/MailKitLite.csproj
index aec3343ad5..27cf1ba1f8 100644
--- a/MailKit/MailKitLite.csproj
+++ b/MailKit/MailKitLite.csproj
@@ -57,7 +57,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('net4')) Or '$(TargetFramework)' == 'netstandard2.0' ">
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.0" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.3" />
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('net4')) Or $(TargetFramework.StartsWith('netstandard')) Or '$(TargetFramework)' == 'net8.0' ">