diff --git a/Mailjet.Client/Mailjet.Client.csproj b/Mailjet.Client/Mailjet.Client.csproj
index 4b37ff8..2a15853 100644
--- a/Mailjet.Client/Mailjet.Client.csproj
+++ b/Mailjet.Client/Mailjet.Client.csproj
@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFrameworks>netstandard1.1</TargetFrameworks>
+		<TargetFrameworks>netstandard2.0</TargetFrameworks>
 		<GeneratePackageOnBuild>False</GeneratePackageOnBuild>
+		<LangVersion>latest</LangVersion>
 		
 		<Version>3.0.0</Version>
 		<PackageVersion>3.0.0</PackageVersion>
@@ -36,7 +37,8 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+		<PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
 	</ItemGroup>
 
 </Project>
diff --git a/Mailjet.Client/MailjetRequest.cs b/Mailjet.Client/MailjetRequest.cs
index 3826fed..09924ce 100644
--- a/Mailjet.Client/MailjetRequest.cs
+++ b/Mailjet.Client/MailjetRequest.cs
@@ -46,7 +46,7 @@ public MailjetRequest Property(string key, JToken value)
 
         public string BuildUrl()
         {
-            string resourceId = ResourceId != null ? ResourceId.Id : null;
+            string resourceId = ResourceId?.Id;
             string actionId = ActionId.HasValue ? ActionId.Value.ToString() : null;
             string url = Resource.BuildUrl(resourceId, actionId);
             return UrlHelper.AddQuerryString(url, Filters);
@@ -56,7 +56,7 @@ public override string ToString()
         {
             dynamic jObject = new JObject();
             jObject.Resource = JObject.FromObject(Resource);
-            jObject.ResourceId = ResourceId != null ? ResourceId.Id : null;
+            jObject.ResourceId = ResourceId?.Id;
             jObject.ActionID = ActionId.HasValue ? ActionId.Value.ToString() : null;
             jObject.Filters = JObject.FromObject(Filters);
             jObject.Body = Body;
diff --git a/Mailjet.ConsoleApplication/Mailjet.ConsoleApplication.csproj b/Mailjet.ConsoleApplication/Mailjet.ConsoleApplication.csproj
index dff07fa..ce384ef 100644
--- a/Mailjet.ConsoleApplication/Mailjet.ConsoleApplication.csproj
+++ b/Mailjet.ConsoleApplication/Mailjet.ConsoleApplication.csproj
@@ -2,11 +2,11 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Mailjet.Tests/Mailjet.Tests.csproj b/Mailjet.Tests/Mailjet.Tests.csproj
index d85bdca..48be4a1 100644
--- a/Mailjet.Tests/Mailjet.Tests.csproj
+++ b/Mailjet.Tests/Mailjet.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>    
-    <TargetFramework>netcoreapp3.1</TargetFramework>    
+    <TargetFramework>net9.0</TargetFramework>    
    
   </PropertyGroup>
 
@@ -16,11 +16,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="1.1.11" />
-    <PackageReference Include="MSTest.TestFramework" Version="1.1.11" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="RichardSzalay.MockHttp" Version="6.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.8.2" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.8.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="RichardSzalay.MockHttp" Version="7.0.0" />
   </ItemGroup>
 
   <ItemGroup>