diff --git a/NewLife.Core/NewLife.Core.csproj b/NewLife.Core/NewLife.Core.csproj
index 4e65bc1..3182f20 100644
--- a/NewLife.Core/NewLife.Core.csproj
+++ b/NewLife.Core/NewLife.Core.csproj
@@ -77,7 +77,7 @@
</ItemGroup>
<ItemGroup Condition="'$(TargetFramework)'=='net461'">
<PackageReference Include="System.ValueTuple" Version="4.5.0" />
- <PackageReference Include="System.Memory" Version="4.5.5" />
+ <PackageReference Include="System.Memory" Version="4.6.0" />
</ItemGroup>
<ItemGroup Condition="'$(TargetFramework)'=='net45'">
<!--<PackageReference Include="System.Net.Http" Version="4.3.4" />-->