diff --git a/appveyor.yml b/appveyor.yml
index 22a045e..cbf6f01 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,7 +15,7 @@ artifacts:
 deploy:
 - provider: NuGet
   api_key:
-    secure: Uft/AgWL0ObDUb6hWLhsftRR1sNhLa5vONUcVa/2KjVAYZApxZD6ckJ+ABFQs3bB
+    secure: yc/gQNTv1/CbW+NYNpSF0SEOAAVVPr96aLb7kWWE764XGrDlG/ijBXyzQ+g6EnFN
   skip_symbols: true
   artifact: /.*\.nupkg/
   on:
diff --git a/src/Flurl.Http.Xml/CapturedXmlContent.cs b/src/Flurl.Http.Xml/CapturedXmlContent.cs
index aaab5a5..dd6e1b0 100644
--- a/src/Flurl.Http.Xml/CapturedXmlContent.cs
+++ b/src/Flurl.Http.Xml/CapturedXmlContent.cs
@@ -1,5 +1,4 @@
-using System.Text;
-using Flurl.Http.Content;
+using Flurl.Http.Content;
 
 namespace Flurl.Http.Xml
 {
@@ -14,6 +13,6 @@ public class CapturedXmlContent : CapturedStringContent
         /// </summary>
         /// <param name="xml">The XML.</param>
         /// <param name="mediaType">The media-type.</param>
-        public CapturedXmlContent(string xml, string mediaType) : base(xml, Encoding.UTF8, mediaType) { }
+        public CapturedXmlContent(string xml, string mediaType) : base(xml, mediaType) { }
     }
 }
\ No newline at end of file
diff --git a/src/Flurl.Http.Xml/Flurl.Http.Xml.csproj b/src/Flurl.Http.Xml/Flurl.Http.Xml.csproj
index 38e9637..75469b3 100644
--- a/src/Flurl.Http.Xml/Flurl.Http.Xml.csproj
+++ b/src/Flurl.Http.Xml/Flurl.Http.Xml.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net45;netstandard1.4;netstandard2.0;netstandard2.1;net461;net472</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net461;net472</TargetFrameworks>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <Authors>Luk Vermeulen</Authors>
@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Flurl.Http" Version="3.0.0-pre3" />
+    <PackageReference Include="Flurl.Http" Version="3.0.0" />
     <PackageReference Include="System.Xml.XmlSerializer" Version="4.3.0" />
   </ItemGroup>
 
diff --git a/src/Flurl.Http.Xml/FlurlRequestExtensions.cs b/src/Flurl.Http.Xml/FlurlRequestExtensions.cs
index 19afa26..689f51b 100644
--- a/src/Flurl.Http.Xml/FlurlRequestExtensions.cs
+++ b/src/Flurl.Http.Xml/FlurlRequestExtensions.cs
@@ -81,7 +81,7 @@ public static Task<IEnumerable<XElement>> GetXElementsFromXPath(this IFlurlReque
         private static string GetMediaType(this IHttpSettingsContainer request)
         {
             var acceptHeaders = request.Headers
-                .Where(x => x.Key == "Accept")
+                .Where(x => x.Name == "Accept")
                 .ToList();
 
             if (!acceptHeaders.Any() || acceptHeaders.All(x => x.Value == null))
@@ -112,11 +112,11 @@ private static string GetMediaType(this IHttpSettingsContainer request)
         /// <returns>
         /// A Task whose result is the received IFlurlResponse.
         /// </returns>
-        public static async Task<IFlurlResponse> SendXmlAsync(this IFlurlRequest request, HttpMethod httpMethod, object data, 
+        public static Task<IFlurlResponse> SendXmlAsync(this IFlurlRequest request, HttpMethod httpMethod, object data, 
             CancellationToken cancellationToken = default, HttpCompletionOption completionOption = HttpCompletionOption.ResponseContentRead)
         {
             var content = new CapturedXmlContent(request.Settings.XmlSerializer().Serialize(data), request.GetMediaType());
-            return await request.SendAsync(httpMethod, content, cancellationToken, completionOption);
+            return request.SendAsync(httpMethod, content, cancellationToken, completionOption);
         }
 
         /// <summary>
diff --git a/test/Flurl.Http.Xml.Tests/Flurl.Http.Xml.Tests.csproj b/test/Flurl.Http.Xml.Tests/Flurl.Http.Xml.Tests.csproj
index 50be15a..6e11ae0 100644
--- a/test/Flurl.Http.Xml.Tests/Flurl.Http.Xml.Tests.csproj
+++ b/test/Flurl.Http.Xml.Tests/Flurl.Http.Xml.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <AssemblyName>Flurl.Http.Xml.Tests</AssemblyName>
     <PackageId>Flurl.Http.Xml.Tests</PackageId>
     <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
@@ -12,15 +12,15 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="3.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="3.1.6" />
     <PackageReference Include="coveralls.io" Version="1.4.2" />
     <PackageReference Include="Microsoft.AspNetCore.Hosting" Version="2.2.7" />
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="3.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="3.1.9" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="OpenCover" Version="4.7.922" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="Xunit.Extensions.Ordering" Version="1.4.5" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>