diff --git a/SlackNet.AspNetCore/SlackNet.AspNetCore.csproj b/SlackNet.AspNetCore/SlackNet.AspNetCore.csproj
index 3ad6238..7d5231c 100644
--- a/SlackNet.AspNetCore/SlackNet.AspNetCore.csproj
+++ b/SlackNet.AspNetCore/SlackNet.AspNetCore.csproj
@@ -30,6 +30,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="1.1.8" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.2.0" />
+    <PackageReference Include="System.Text.Encodings.Web" Version="4.5.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/SlackNet.AzureFunctions/SlackNet.AzureFunctions.csproj b/SlackNet.AzureFunctions/SlackNet.AzureFunctions.csproj
index 8933069..b129247 100644
--- a/SlackNet.AzureFunctions/SlackNet.AzureFunctions.csproj
+++ b/SlackNet.AzureFunctions/SlackNet.AzureFunctions.csproj
@@ -12,7 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Azure.Functions.Worker.Core" Version="1.6.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Core" Version="1.17.0" />
   </ItemGroup>
 
 </Project>
diff --git a/SlackNet/SlackNet.csproj b/SlackNet/SlackNet.csproj
index abedebf..9e77aeb 100644
--- a/SlackNet/SlackNet.csproj
+++ b/SlackNet/SlackNet.csproj
@@ -38,7 +38,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="System.Net.Security" Version="4.3.1" />
     <PackageReference Include="System.Reactive" Version="4.3.2" />
+    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
     <PackageReference Include="WebSocket4Net" Version="0.15.1" />
   </ItemGroup>