diff --git a/Rx.NET/Source/Directory.build.targets b/Rx.NET/Source/Directory.build.targets
index f1bdbc115a..4c11f9310f 100644
--- a/Rx.NET/Source/Directory.build.targets
+++ b/Rx.NET/Source/Directory.build.targets
@@ -26,7 +26,7 @@
 
 
   <ItemGroup Condition="'$(TargetFramework)' != 'netcoreapp3.0'">
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.2" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
   </ItemGroup>
 
   <Target Name="AddCommitHashToAssemblyAttributes" BeforeTargets="GetAssemblyAttributes">