diff --git a/ExternalMethods/ExternalMethods.csproj b/ExternalMethods/ExternalMethods.csproj
index 767f7fe..7977d1b 100644
--- a/ExternalMethods/ExternalMethods.csproj
+++ b/ExternalMethods/ExternalMethods.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0-windows8.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/JUST.net/JUST.net.csproj b/JUST.net/JUST.net.csproj
index efed904..684cc47 100644
--- a/JUST.net/JUST.net.csproj
+++ b/JUST.net/JUST.net.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <Title>JUST - JSON Under Simple Transformation</Title>
-    <TargetFrameworks>net6.0-windows8.0</TargetFrameworks>
+	<TargetFramework>netstandard2.0</TargetFramework>
     <Description>This a cool .NET Standard library which enables you to transform a JSON document into another JSON document using JSON transformations using JSON path. This is the JSON equivalent of XSLT. 
 This will repace the JUST and JUST.NETCore packages.</Description>
     <Summary>This is the JSON equivalent of XSLT</Summary>
diff --git a/JUST.net/Properties/PublishProfiles/FolderProfile.pubxml b/JUST.net/Properties/PublishProfiles/FolderProfile.pubxml
index 5672e42..296ffbd 100644
--- a/JUST.net/Properties/PublishProfiles/FolderProfile.pubxml
+++ b/JUST.net/Properties/PublishProfiles/FolderProfile.pubxml
@@ -7,7 +7,7 @@ by editing this MSBuild file. In order to learn more about this please visit htt
   <PropertyGroup>
     <PublishProtocol>FileSystem</PublishProtocol>
     <Configuration>Release</Configuration>
-    <TargetFramework>netstandard1.6</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <PublishDir>bin\Release\PublishOutput</PublishDir>
   </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/JUST.net/Transformer.cs b/JUST.net/Transformer.cs
index 440aa23..07d8a2b 100644
--- a/JUST.net/Transformer.cs
+++ b/JUST.net/Transformer.cs
@@ -712,6 +712,11 @@ public static object tointeger(object val, JUSTContext context)
             return ReflectionHelper.GetTypedValue(typeof(int), val, context.EvaluationMode);
         }
 
+        public static object tolong(object val, JUSTContext context)
+        {
+            return ReflectionHelper.GetTypedValue(typeof(long), val, context.EvaluationMode);
+        }
+
         public static object tostring(object val, JUSTContext context)
         {
             return ReflectionHelper.GetTypedValue(typeof(string), val, context.EvaluationMode);
diff --git a/UnitTestForExternalAssemblyBug/UnitTestForExternalAssemblyBug.csproj b/UnitTestForExternalAssemblyBug/UnitTestForExternalAssemblyBug.csproj
index 4a22afc..d255ec2 100644
--- a/UnitTestForExternalAssemblyBug/UnitTestForExternalAssemblyBug.csproj
+++ b/UnitTestForExternalAssemblyBug/UnitTestForExternalAssemblyBug.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0-windows8.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
diff --git a/UnitTests/JUST.net.UnitTests.csproj b/UnitTests/JUST.net.UnitTests.csproj
index 0d9320e..f454097 100644
--- a/UnitTests/JUST.net.UnitTests.csproj
+++ b/UnitTests/JUST.net.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0-windows8.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
diff --git a/UnitTests/TypeConversionTests.cs b/UnitTests/TypeConversionTests.cs
index 5a83fd5..91b4712 100644
--- a/UnitTests/TypeConversionTests.cs
+++ b/UnitTests/TypeConversionTests.cs
@@ -58,6 +58,23 @@ public void ToIntegerConvertion(string typedValue, string expectedResult)
             Assert.AreEqual($"{{\"result\":{expectedResult}}}", result);
         }
 
+        [TestCase("\"12345678901\"", "12345678901")]
+        [TestCase("\"-12345678901\"", "-12345678901")]
+        [TestCase("\"0\"", "0")]
+        [TestCase("12345678901.23", "12345678901")]
+        [TestCase("-12345678901.56", "-12345678902")]
+        [TestCase("true", "1")]
+        [TestCase("false", "0")]
+        public void ToLongConversion(string typedValue, string expectedResult)
+        {
+            var input = $"{{ \"value\": {typedValue} }}";
+            const string transformer = "{ \"result\": \"#tolong(#valueof($.value))\" }";
+
+            var result = new JsonTransformer().Transform(transformer, input);
+
+            Assert.AreEqual($"{{\"result\":{expectedResult}}}", result);
+        }
+
         [TestCase("\"0\"", "0.0")]
         [TestCase("\"1.01\"", "1.01")]
         [TestCase("123", "123.0")]