diff --git a/DigitalPlatform.MessageServer/DigitalPlatform.MessageServer.csproj b/DigitalPlatform.MessageServer/DigitalPlatform.MessageServer.csproj
index 49f13a34..8a2cf4a7 100644
--- a/DigitalPlatform.MessageServer/DigitalPlatform.MessageServer.csproj
+++ b/DigitalPlatform.MessageServer/DigitalPlatform.MessageServer.csproj
@@ -38,12 +38,24 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="DnsClient, Version=1.4.0.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
-      <HintPath>..\packages\DnsClient.1.4.0\lib\net45\DnsClient.dll</HintPath>
+    <Reference Include="AWSSDK.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
+      <HintPath>..\packages\AWSSDK.Core.3.7.100.14\lib\net45\AWSSDK.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="AWSSDK.SecurityToken, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
+      <HintPath>..\packages\AWSSDK.SecurityToken.3.7.100.14\lib\net45\AWSSDK.SecurityToken.dll</HintPath>
+    </Reference>
+    <Reference Include="DnsClient, Version=1.6.1.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
+      <HintPath>..\packages\DnsClient.1.6.1\lib\net471\DnsClient.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.AspNet.SignalR.Core, Version=2.4.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.AspNet.SignalR.Core.2.4.1\lib\net45\Microsoft.AspNet.SignalR.Core.dll</HintPath>
     </Reference>
+    <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Bcl.AsyncInterfaces.5.0.0\lib\net461\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Extensions.Logging.Abstractions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Extensions.Logging.Abstractions.2.0.0\lib\netstandard2.0\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.Owin, Version=4.2.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Owin.4.2.2\lib\net45\Microsoft.Owin.dll</HintPath>
     </Reference>
@@ -62,17 +74,20 @@
     <Reference Include="Microsoft.Owin.Security, Version=4.1.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Owin.Security.4.1.1\lib\net45\Microsoft.Owin.Security.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Bson, Version=2.12.4.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Bson.2.12.4\lib\net452\MongoDB.Bson.dll</HintPath>
+    <Reference Include="Microsoft.Win32.Registry, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Win32.Registry.5.0.0\lib\net461\Microsoft.Win32.Registry.dll</HintPath>
+    </Reference>
+    <Reference Include="MongoDB.Bson, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Bson.2.19.0\lib\net472\MongoDB.Bson.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver, Version=2.12.4.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Driver.2.12.4\lib\net452\MongoDB.Driver.dll</HintPath>
+    <Reference Include="MongoDB.Driver, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.2.19.0\lib\net472\MongoDB.Driver.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver.Core, Version=2.12.4.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Driver.Core.2.12.4\lib\net452\MongoDB.Driver.Core.dll</HintPath>
+    <Reference Include="MongoDB.Driver.Core, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.Core.2.19.0\lib\net472\MongoDB.Driver.Core.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Libmongocrypt, Version=1.2.1.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Libmongocrypt.1.2.1\lib\net452\MongoDB.Libmongocrypt.dll</HintPath>
+    <Reference Include="MongoDB.Libmongocrypt, Version=1.7.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Libmongocrypt.1.7.0\lib\net472\MongoDB.Libmongocrypt.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\packages\Newtonsoft.Json.13.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
@@ -81,8 +96,11 @@
       <HintPath>..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="SharpCompress, Version=0.29.0.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
-      <HintPath>..\packages\SharpCompress.0.29.0\lib\netstandard2.0\SharpCompress.dll</HintPath>
+    <Reference Include="SharpCompress, Version=0.30.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+      <HintPath>..\packages\SharpCompress.0.30.1\lib\net461\SharpCompress.dll</HintPath>
+    </Reference>
+    <Reference Include="Snappier, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a1b25124e6e13a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\Snappier.1.0.0\lib\netstandard2.0\Snappier.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
@@ -121,6 +139,9 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Security" />
+    <Reference Include="System.Security.AccessControl, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Security.AccessControl.5.0.0\lib\net461\System.Security.AccessControl.dll</HintPath>
+    </Reference>
     <Reference Include="System.Security.Cryptography.Algorithms, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Security.Cryptography.Algorithms.4.3.1\lib\net463\System.Security.Cryptography.Algorithms.dll</HintPath>
       <Private>True</Private>
@@ -141,9 +162,15 @@
       <Private>True</Private>
       <Private>True</Private>
     </Reference>
+    <Reference Include="System.Security.Principal.Windows, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Security.Principal.Windows.5.0.0\lib\net461\System.Security.Principal.Windows.dll</HintPath>
+    </Reference>
     <Reference Include="System.Text.Encoding.CodePages, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Text.Encoding.CodePages.5.0.0\lib\net461\System.Text.Encoding.CodePages.dll</HintPath>
     </Reference>
+    <Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
     <Reference Include="System.Web.Cors, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.AspNet.Cors.5.2.7\lib\net45\System.Web.Cors.dll</HintPath>
     </Reference>
@@ -152,6 +179,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="ZstdSharp, Version=0.6.2.0, Culture=neutral, PublicKeyToken=8d151af33a4ad5cf, processorArchitecture=MSIL">
+      <HintPath>..\packages\ZstdSharp.Port.0.6.2\lib\net461\ZstdSharp.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ConnectionTable.cs" />
@@ -193,22 +223,20 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <Content Include="Core\Compression\Snappy\lib\win\snappy32.dll" />
-    <Content Include="Core\Compression\Snappy\lib\win\snappy64.dll" />
-    <Content Include="Core\Compression\Zstandard\lib\win\libzstd.dll" />
     <Content Include="deleted.txt" />
     <Content Include="mongocrypt.dll" />
   </ItemGroup>
+  <ItemGroup>
+    <Analyzer Include="..\packages\AWSSDK.SecurityToken.3.7.100.14\analyzers\dotnet\cs\AWSSDK.SecurityToken.CodeAnalysis.dll" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\MongoDB.Libmongocrypt.1.2.1\build\MongoDB.Libmongocrypt.targets" Condition="Exists('..\packages\MongoDB.Libmongocrypt.1.2.1\build\MongoDB.Libmongocrypt.targets')" />
+  <Import Project="..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets" Condition="Exists('..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>这台计算机上缺少此项目引用的 NuGet 程序包。使用“NuGet 程序包还原”可下载这些程序包。有关更多信息，请参见 http://go.microsoft.com/fwlink/?LinkID=322105。缺少的文件是 {0}。</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\MongoDB.Libmongocrypt.1.2.1\build\MongoDB.Libmongocrypt.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.Libmongocrypt.1.2.1\build\MongoDB.Libmongocrypt.targets'))" />
-    <Error Condition="!Exists('..\packages\MongoDB.Driver.Core.2.12.4\build\MongoDB.Driver.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.Driver.Core.2.12.4\build\MongoDB.Driver.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets'))" />
   </Target>
-  <Import Project="..\packages\MongoDB.Driver.Core.2.12.4\build\MongoDB.Driver.Core.targets" Condition="Exists('..\packages\MongoDB.Driver.Core.2.12.4\build\MongoDB.Driver.Core.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/DigitalPlatform.MessageServer/libmongocrypt.dylib b/DigitalPlatform.MessageServer/libmongocrypt.dylib
index 91418d4d..fe72af3e 100644
Binary files a/DigitalPlatform.MessageServer/libmongocrypt.dylib and b/DigitalPlatform.MessageServer/libmongocrypt.dylib differ
diff --git a/DigitalPlatform.MessageServer/libmongocrypt.so b/DigitalPlatform.MessageServer/libmongocrypt.so
index 2e6bae00..cfc0cc44 100644
Binary files a/DigitalPlatform.MessageServer/libmongocrypt.so and b/DigitalPlatform.MessageServer/libmongocrypt.so differ
diff --git a/DigitalPlatform.MessageServer/packages.config b/DigitalPlatform.MessageServer/packages.config
index f7df60b6..8704fcc7 100644
--- a/DigitalPlatform.MessageServer/packages.config
+++ b/DigitalPlatform.MessageServer/packages.config
@@ -1,8 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="DnsClient" version="1.4.0" targetFramework="net472" requireReinstallation="true" />
+  <package id="AWSSDK.Core" version="3.7.100.14" targetFramework="net472" />
+  <package id="AWSSDK.SecurityToken" version="3.7.100.14" targetFramework="net472" />
+  <package id="DnsClient" version="1.6.1" targetFramework="net472" />
   <package id="Microsoft.AspNet.Cors" version="5.2.7" targetFramework="net472" />
   <package id="Microsoft.AspNet.SignalR.Core" version="2.4.1" targetFramework="net472" />
+  <package id="Microsoft.Bcl.AsyncInterfaces" version="5.0.0" targetFramework="net472" />
+  <package id="Microsoft.Extensions.Logging.Abstractions" version="2.0.0" targetFramework="net472" />
   <package id="Microsoft.Owin" version="4.2.2" targetFramework="net472" />
   <package id="Microsoft.Owin.Cors" version="4.1.1" targetFramework="net472" />
   <package id="Microsoft.Owin.Diagnostics" version="4.1.1" targetFramework="net472" />
@@ -10,13 +14,15 @@
   <package id="Microsoft.Owin.Hosting" version="4.1.1" targetFramework="net472" />
   <package id="Microsoft.Owin.Security" version="4.1.1" targetFramework="net472" />
   <package id="Microsoft.Owin.SelfHost" version="4.1.1" targetFramework="net472" />
-  <package id="MongoDB.Bson" version="2.12.4" targetFramework="net472" />
-  <package id="MongoDB.Driver" version="2.12.4" targetFramework="net472" />
-  <package id="MongoDB.Driver.Core" version="2.12.4" targetFramework="net472" />
-  <package id="MongoDB.Libmongocrypt" version="1.2.1" targetFramework="net472" />
+  <package id="Microsoft.Win32.Registry" version="5.0.0" targetFramework="net472" />
+  <package id="MongoDB.Bson" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Driver" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Driver.Core" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Libmongocrypt" version="1.7.0" targetFramework="net472" />
   <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net472" />
   <package id="Owin" version="1.0" targetFramework="net45" />
-  <package id="SharpCompress" version="0.29.0" targetFramework="net472" />
+  <package id="SharpCompress" version="0.30.1" targetFramework="net472" />
+  <package id="Snappier" version="1.0.0" targetFramework="net472" />
   <package id="System.Buffers" version="4.5.1" targetFramework="net472" />
   <package id="System.IO" version="4.3.0" targetFramework="net472" />
   <package id="System.Memory" version="4.5.4" targetFramework="net472" />
@@ -25,9 +31,13 @@
   <package id="System.Runtime" version="4.3.1" targetFramework="net472" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net472" />
   <package id="System.Runtime.InteropServices.RuntimeInformation" version="4.3.0" targetFramework="net472" />
+  <package id="System.Security.AccessControl" version="5.0.0" targetFramework="net472" />
   <package id="System.Security.Cryptography.Algorithms" version="4.3.1" targetFramework="net472" />
   <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net472" />
   <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net472" />
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.2" targetFramework="net472" />
+  <package id="System.Security.Principal.Windows" version="5.0.0" targetFramework="net472" />
   <package id="System.Text.Encoding.CodePages" version="5.0.0" targetFramework="net472" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net472" />
+  <package id="ZstdSharp.Port" version="0.6.2" targetFramework="net472" />
 </packages>
\ No newline at end of file
diff --git a/WebZ.Server/WebZ.Server.csproj b/WebZ.Server/WebZ.Server.csproj
index da993f8c..55fb9c4c 100644
--- a/WebZ.Server/WebZ.Server.csproj
+++ b/WebZ.Server/WebZ.Server.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MongoDB.Driver" Version="2.12.0" />
+    <PackageReference Include="MongoDB.Driver" Version="2.19.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="5.0.0" />
   </ItemGroup>
 
diff --git a/dp-library b/dp-library
index aa89e521..7c720d93 160000
--- a/dp-library
+++ b/dp-library
@@ -1 +1 @@
-Subproject commit aa89e5216a997d2600c00002c2644cbc50d643c5
+Subproject commit 7c720d93adddb3212df9325f29c3caaf683312d3
diff --git a/dp2weixin.service/dp2weixin.service.csproj b/dp2weixin.service/dp2weixin.service.csproj
index e812be9c..1803373a 100644
--- a/dp2weixin.service/dp2weixin.service.csproj
+++ b/dp2weixin.service/dp2weixin.service.csproj
@@ -36,30 +36,45 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="AWSSDK.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
+      <HintPath>..\packages\AWSSDK.Core.3.7.100.14\lib\net45\AWSSDK.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="AWSSDK.SecurityToken, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
+      <HintPath>..\packages\AWSSDK.SecurityToken.3.7.100.14\lib\net45\AWSSDK.SecurityToken.dll</HintPath>
+    </Reference>
     <Reference Include="CommonMark, Version=0.1.0.0, Culture=neutral, PublicKeyToken=001ef8810438905d, processorArchitecture=MSIL">
       <HintPath>..\packages\CommonMark.NET.0.15.1\lib\net45\CommonMark.dll</HintPath>
     </Reference>
     <Reference Include="Crc32C.NET, Version=1.0.5.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\Crc32C.NET.1.0.5.0\lib\net20\Crc32C.NET.dll</HintPath>
     </Reference>
-    <Reference Include="DnsClient, Version=1.4.0.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
-      <HintPath>..\packages\DnsClient.1.4.0\lib\net471\DnsClient.dll</HintPath>
+    <Reference Include="DnsClient, Version=1.6.1.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
+      <HintPath>..\packages\DnsClient.1.6.1\lib\net471\DnsClient.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Bcl.AsyncInterfaces.5.0.0\lib\net461\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Extensions.Logging.Abstractions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Extensions.Logging.Abstractions.2.0.0\lib\netstandard2.0\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Web.Infrastructure.1.0.0.0\lib\net40\Microsoft.Web.Infrastructure.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="MongoDB.Bson, Version=2.12.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Bson.2.12.0\lib\net452\MongoDB.Bson.dll</HintPath>
+    <Reference Include="Microsoft.Win32.Registry, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.Win32.Registry.5.0.0\lib\net461\Microsoft.Win32.Registry.dll</HintPath>
+    </Reference>
+    <Reference Include="MongoDB.Bson, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Bson.2.19.0\lib\net472\MongoDB.Bson.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver, Version=2.12.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Driver.2.12.0\lib\net452\MongoDB.Driver.dll</HintPath>
+    <Reference Include="MongoDB.Driver, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.2.19.0\lib\net472\MongoDB.Driver.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver.Core, Version=2.12.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Driver.Core.2.12.0\lib\net452\MongoDB.Driver.Core.dll</HintPath>
+    <Reference Include="MongoDB.Driver.Core, Version=2.19.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.Core.2.19.0\lib\net472\MongoDB.Driver.Core.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.LibMongocrypt, Version=1.2.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.LibMongocrypt.1.2.0\lib\net452\MongoDB.LibMongocrypt.dll</HintPath>
+    <Reference Include="MongoDB.Libmongocrypt, Version=1.7.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Libmongocrypt.1.7.0\lib\net472\MongoDB.Libmongocrypt.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\packages\Newtonsoft.Json.13.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
@@ -82,8 +97,11 @@
     <Reference Include="Senparc.Weixin.MP, Version=16.11.200.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\Senparc.Weixin.MP.16.11.200\lib\net45\Senparc.Weixin.MP.dll</HintPath>
     </Reference>
-    <Reference Include="SharpCompress, Version=0.29.0.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
-      <HintPath>..\packages\SharpCompress.0.29.0\lib\netstandard2.0\SharpCompress.dll</HintPath>
+    <Reference Include="SharpCompress, Version=0.30.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+      <HintPath>..\packages\SharpCompress.0.30.1\lib\net461\SharpCompress.dll</HintPath>
+    </Reference>
+    <Reference Include="Snappier, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a1b25124e6e13a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\Snappier.1.0.0\lib\netstandard2.0\Snappier.dll</HintPath>
     </Reference>
     <Reference Include="Snappy.NET, Version=1.1.1.8, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\Snappy.NET.1.1.1.8\lib\net45\Snappy.NET.dll</HintPath>
@@ -125,6 +143,9 @@
       <HintPath>..\packages\System.Runtime.InteropServices.RuntimeInformation.4.3.0\lib\net45\System.Runtime.InteropServices.RuntimeInformation.dll</HintPath>
     </Reference>
     <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.Security.AccessControl, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Security.AccessControl.5.0.0\lib\net461\System.Security.AccessControl.dll</HintPath>
+    </Reference>
     <Reference Include="System.Security.Cryptography.Algorithms, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Security.Cryptography.Algorithms.4.3.1\lib\net463\System.Security.Cryptography.Algorithms.dll</HintPath>
       <Private>True</Private>
@@ -145,9 +166,15 @@
       <Private>True</Private>
       <Private>True</Private>
     </Reference>
+    <Reference Include="System.Security.Principal.Windows, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Security.Principal.Windows.5.0.0\lib\net461\System.Security.Principal.Windows.dll</HintPath>
+    </Reference>
     <Reference Include="System.Text.Encoding.CodePages, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Text.Encoding.CodePages.5.0.0\lib\net461\System.Text.Encoding.CodePages.dll</HintPath>
     </Reference>
+    <Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
     <Reference Include="System.Web" />
     <Reference Include="System.Web.Extensions" />
     <Reference Include="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -173,6 +200,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="ZstdSharp, Version=0.6.2.0, Culture=neutral, PublicKeyToken=8d151af33a4ad5cf, processorArchitecture=MSIL">
+      <HintPath>..\packages\ZstdSharp.Port.0.6.2\lib\net461\ZstdSharp.dll</HintPath>
+    </Reference>
     <Reference Include="zxing">
       <HintPath>..\packages\ZXing.2.1.1\lib\net20\zxing.dll</HintPath>
     </Reference>
@@ -259,20 +289,16 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <Content Include="Core\Compression\Snappy\lib\win\snappy32.dll" />
-    <Content Include="Core\Compression\Snappy\lib\win\snappy64.dll" />
-    <Content Include="Core\Compression\Zstandard\lib\win\libzstd.dll" />
+    <Analyzer Include="..\packages\AWSSDK.SecurityToken.3.7.100.14\analyzers\dotnet\cs\AWSSDK.SecurityToken.CodeAnalysis.dll" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\MongoDB.LibMongocrypt.1.2.0\build\MongoDB.Libmongocrypt.targets" Condition="Exists('..\packages\MongoDB.LibMongocrypt.1.2.0\build\MongoDB.Libmongocrypt.targets')" />
+  <Import Project="..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets" Condition="Exists('..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>这台计算机上缺少此项目引用的 NuGet 程序包。使用“NuGet 程序包还原”可下载这些程序包。有关更多信息，请参见 http://go.microsoft.com/fwlink/?LinkID=322105。缺少的文件是 {0}。</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\MongoDB.LibMongocrypt.1.2.0\build\MongoDB.Libmongocrypt.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.LibMongocrypt.1.2.0\build\MongoDB.Libmongocrypt.targets'))" />
-    <Error Condition="!Exists('..\packages\MongoDB.Driver.Core.2.12.0\build\MongoDB.Driver.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.Driver.Core.2.12.0\build\MongoDB.Driver.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MongoDB.Libmongocrypt.1.7.0\build\MongoDB.Libmongocrypt.targets'))" />
   </Target>
-  <Import Project="..\packages\MongoDB.Driver.Core.2.12.0\build\MongoDB.Driver.Core.targets" Condition="Exists('..\packages\MongoDB.Driver.Core.2.12.0\build\MongoDB.Driver.Core.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/dp2weixin.service/libmongocrypt.dylib b/dp2weixin.service/libmongocrypt.dylib
index 91418d4d..fe72af3e 100644
Binary files a/dp2weixin.service/libmongocrypt.dylib and b/dp2weixin.service/libmongocrypt.dylib differ
diff --git a/dp2weixin.service/libmongocrypt.so b/dp2weixin.service/libmongocrypt.so
index 2e6bae00..cfc0cc44 100644
Binary files a/dp2weixin.service/libmongocrypt.so and b/dp2weixin.service/libmongocrypt.so differ
diff --git a/dp2weixin.service/packages.config b/dp2weixin.service/packages.config
index b8476e80..8bc9328e 100644
--- a/dp2weixin.service/packages.config
+++ b/dp2weixin.service/packages.config
@@ -1,16 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="AWSSDK.Core" version="3.7.100.14" targetFramework="net472" />
+  <package id="AWSSDK.SecurityToken" version="3.7.100.14" targetFramework="net472" />
   <package id="CommonMark.NET" version="0.15.1" targetFramework="net461" />
   <package id="Crc32C.NET" version="1.0.5.0" targetFramework="net461" />
-  <package id="DnsClient" version="1.4.0" targetFramework="net472" />
+  <package id="DnsClient" version="1.6.1" targetFramework="net472" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.7" targetFramework="net461" />
   <package id="Microsoft.AspNet.Razor" version="3.2.7" targetFramework="net461" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.7" targetFramework="net461" />
+  <package id="Microsoft.Bcl.AsyncInterfaces" version="5.0.0" targetFramework="net472" />
+  <package id="Microsoft.Extensions.Logging.Abstractions" version="2.0.0" targetFramework="net472" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net452" />
-  <package id="MongoDB.Bson" version="2.12.0" targetFramework="net461" />
-  <package id="MongoDB.Driver" version="2.12.0" targetFramework="net461" />
-  <package id="MongoDB.Driver.Core" version="2.12.0" targetFramework="net461" />
-  <package id="MongoDB.LibMongocrypt" version="1.2.0" targetFramework="net461" />
+  <package id="Microsoft.Win32.Registry" version="5.0.0" targetFramework="net472" />
+  <package id="MongoDB.Bson" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Driver" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Driver.Core" version="2.19.0" targetFramework="net472" />
+  <package id="MongoDB.Libmongocrypt" version="1.7.0" targetFramework="net472" />
   <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net472" />
   <package id="Senparc.CO2NET" version="1.3.200" targetFramework="net461" />
   <package id="Senparc.CO2NET.APM" version="0.9.200" targetFramework="net461" />
@@ -18,7 +23,8 @@
   <package id="Senparc.NeuChar.App" version="0.9.200" targetFramework="net461" />
   <package id="Senparc.Weixin" version="6.8.200" targetFramework="net461" />
   <package id="Senparc.Weixin.MP" version="16.11.200" targetFramework="net461" />
-  <package id="SharpCompress" version="0.29.0" targetFramework="net472" />
+  <package id="SharpCompress" version="0.30.1" targetFramework="net472" />
+  <package id="Snappier" version="1.0.0" targetFramework="net472" />
   <package id="Snappy.NET" version="1.1.1.8" targetFramework="net461" />
   <package id="System.Buffers" version="4.5.1" targetFramework="net461" />
   <package id="System.IO" version="4.3.0" targetFramework="net472" />
@@ -28,10 +34,14 @@
   <package id="System.Runtime" version="4.3.1" targetFramework="net472" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net461" />
   <package id="System.Runtime.InteropServices.RuntimeInformation" version="4.3.0" targetFramework="net461" />
+  <package id="System.Security.AccessControl" version="5.0.0" targetFramework="net472" />
   <package id="System.Security.Cryptography.Algorithms" version="4.3.1" targetFramework="net472" />
   <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.2" targetFramework="net472" />
+  <package id="System.Security.Principal.Windows" version="5.0.0" targetFramework="net472" />
   <package id="System.Text.Encoding.CodePages" version="5.0.0" targetFramework="net461" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net472" />
+  <package id="ZstdSharp.Port" version="0.6.2" targetFramework="net472" />
   <package id="ZXing" version="2.1.1" targetFramework="net45" />
 </packages>
\ No newline at end of file