diff --git a/src/DotNetty.Handlers/DotNetty.Handlers.csproj b/src/DotNetty.Handlers/DotNetty.Handlers.csproj
index 519d2398c..6cc57e489 100644
--- a/src/DotNetty.Handlers/DotNetty.Handlers.csproj
+++ b/src/DotNetty.Handlers/DotNetty.Handlers.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?><Project Sdk="Microsoft.NET.Sdk">
+<?xml version="1.0" encoding="utf-8"?><Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="NuGet">
     <TargetFrameworks>netstandard1.3;net45</TargetFrameworks>
     <IsPackable>true</IsPackable>
@@ -33,7 +33,7 @@
     <ProjectReference Include="..\DotNetty.Transport\DotNetty.Transport.csproj" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
-    <PackageReference Include="System.Net.Security" Version="4.3.0" />
+    <PackageReference Include="System.Net.Security" Version="4.3.1" />
     <PackageReference Include="System.Diagnostics.Contracts" Version="4.3.0" />
     <PackageReference Include="System.Globalization.Extensions" Version="4.3.0" />
   </ItemGroup>