diff --git a/docs/index.md b/docs/index.md
index 468c060e..e1d3febf 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -20,7 +20,7 @@ Here is a visual representation of the above:
 Installation is pretty simple, just copy and paste the following command:
 
 ~~~
-dotnet tool install --global dotnet-dash --version 0.6.0-alpha
+dotnet tool install --global dotnet-dash --version 0.6.1-alpha
 ~~~
 
 If you have successfully installed Dash, the following command will bring up the help screen:
@@ -33,7 +33,7 @@ dotnet dash --help
 Updating to the latest, or different, version of Dash is equally simple:
 
 ~~~
-dotnet tool update --global dotnet-dash --version 0.6.0-alpha
+dotnet tool update --global dotnet-dash --version 0.6.1-alpha
 ~~~
 
 ## Hello World example
diff --git a/src/Dash/src/Dash/Dash.csproj b/src/Dash/src/Dash/Dash.csproj
index 120b8fbe..5f83cb86 100644
--- a/src/Dash/src/Dash/Dash.csproj
+++ b/src/Dash/src/Dash/Dash.csproj
@@ -2,9 +2,9 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <Nullable>enable</Nullable>
-    <Version>0.6.0-alpha</Version>
+    <Version>0.6.1-alpha</Version>
     <PackAsTool>true</PackAsTool>
     <ToolCommandName>dotnet-dash</ToolCommandName>
     <PackageOutputPath>./nupkg</PackageOutputPath>
diff --git a/src/Dash/src/Dash/Engine/IModelRepository.cs b/src/Dash/src/Dash/Engine/IModelRepository.cs
index ee67f3ad..39252120 100644
--- a/src/Dash/src/Dash/Engine/IModelRepository.cs
+++ b/src/Dash/src/Dash/Engine/IModelRepository.cs
@@ -16,6 +16,6 @@ public interface IModelRepository
 
         EntityModel Get(string entityName);
 
-        bool TryGet(string entityName, out EntityModel entityModel);
+        bool TryGet(string entityName, out EntityModel? entityModel);
     }
 }
\ No newline at end of file
diff --git a/src/Dash/src/Dash/Engine/Parsers/DefaultSourceCodeParser.cs b/src/Dash/src/Dash/Engine/Parsers/DefaultSourceCodeParser.cs
index 4cfa96a8..81c210e9 100644
--- a/src/Dash/src/Dash/Engine/Parsers/DefaultSourceCodeParser.cs
+++ b/src/Dash/src/Dash/Engine/Parsers/DefaultSourceCodeParser.cs
@@ -51,7 +51,7 @@ private ConfigurationNode ParseConfiguration(JsonDocument document)
 
             var deserialized = JsonSerializer.Deserialize<ConfigurationNode>(configurationSourceCode);
 
-            foreach (var item in deserialized.Templates)
+            foreach (var item in deserialized!.Templates)
             {
                 if (item.Output == null)
                 {
@@ -62,7 +62,7 @@ private ConfigurationNode ParseConfiguration(JsonDocument document)
             return deserialized;
         }
 
-        private ModelNode ParseModel(JsonDocument document)
+        private static ModelNode ParseModel(JsonDocument document)
         {
             var result = new ModelNode();
 
@@ -80,7 +80,7 @@ private ModelNode ParseModel(JsonDocument document)
             return result;
         }
 
-        private void TraverseRelationshipProperties(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator objectProperties)
+        private static void TraverseRelationshipProperties(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator objectProperties)
         {
             objectProperties.Reset();
 
@@ -97,7 +97,7 @@ private void TraverseRelationshipProperties(EntityDeclarationNode entityDeclarat
             }
         }
 
-        private void ProcessRelationshipProperty(JsonProperty objectProperty, string relationship, Action<string, string> func)
+        private static void ProcessRelationshipProperty(JsonProperty objectProperty, string relationship, Action<string, string> func)
         {
             if (objectProperty.Name.IsSame(relationship))
             {
@@ -105,20 +105,20 @@ private void ProcessRelationshipProperty(JsonProperty objectProperty, string rel
                 {
                     foreach (var hasProperty in objectProperty.Value.EnumerateObject())
                     {
-                        func(hasProperty.Name, hasProperty.Value.GetString());
+                        func(hasProperty.Name, hasProperty.Value.GetString()!);
                     }
                 }
                 else if (objectProperty.Value.ValueKind == JsonValueKind.Array)
                 {
                     foreach (var hasProperty in objectProperty.Value.EnumerateArray())
                     {
-                        func(hasProperty.GetString(), hasProperty.GetString());
+                        func(hasProperty.GetString()!, hasProperty.GetString()!);
                     }
                 }
             }
         }
 
-        private void TryTraverseSeed(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator entityObjectProperties)
+        private static void TryTraverseSeed(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator entityObjectProperties)
         {
             foreach (var item in entityObjectProperties.Where(e => e.Name.IsSame("@@Seed")))
             {
@@ -129,7 +129,7 @@ private void TryTraverseSeed(EntityDeclarationNode entityDeclarationNode, JsonEl
                         throw new ParserException("The 'FromCsv' value must be an Object");
                     }
 
-                    var uri = new Uri(csvElement.GetProperty("Uri").GetString());
+                    var uri = new Uri(csvElement.GetProperty("Uri").GetString()!);
 
                     var firstLineIsHeader = false;
                     if (csvElement.TryGetProperty("FirstLineIsHeader", out var value))
@@ -146,7 +146,7 @@ private void TryTraverseSeed(EntityDeclarationNode entityDeclarationNode, JsonEl
                         delimiter = delimiterJsonElement.GetString();
                     }
 
-                    entityDeclarationNode.AddCsvSeedDeclarationNode(uri, firstLineIsHeader, delimiter, mapHeaders);
+                    entityDeclarationNode.AddCsvSeedDeclarationNode(uri, firstLineIsHeader, delimiter, mapHeaders!);
                     continue;
                 }
 
@@ -154,7 +154,7 @@ private void TryTraverseSeed(EntityDeclarationNode entityDeclarationNode, JsonEl
             }
         }
 
-        private void TraverseModelEntities(ModelNode modelNode, JsonProperty entityObject)
+        private static void TraverseModelEntities(ModelNode modelNode, JsonProperty entityObject)
         {
             if (entityObject.Value.ValueKind == JsonValueKind.Object && !entityObject.Name.StartsWith("@@"))
             {
@@ -167,7 +167,7 @@ private void TraverseModelEntities(ModelNode modelNode, JsonProperty entityObjec
             }
         }
 
-        private void TraverseAttributes(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator attributes)
+        private static void TraverseAttributes(EntityDeclarationNode entityDeclarationNode, JsonElement.ObjectEnumerator attributes)
         {
             attributes.Reset();
             foreach (var attribute in attributes)
@@ -176,14 +176,14 @@ private void TraverseAttributes(EntityDeclarationNode entityDeclarationNode, Jso
                 {
                     if (attribute.Value.ValueKind == JsonValueKind.String)
                     {
-                        entityDeclarationNode.AddAttributeDeclaration(attribute.Name, attribute.Value.GetString());
+                        entityDeclarationNode.AddAttributeDeclaration(attribute.Name, attribute.Value.GetString()!);
                     }
                 }
                 else
                 {
                     if (attribute.Name.IsSame("@@Inherits"))
                     {
-                        entityDeclarationNode.AddInheritanceDeclaration(attribute.Value.GetString());
+                        entityDeclarationNode.AddInheritanceDeclaration(attribute.Value.GetString()!);
                     }
                     else if (attribute.Name.IsSame("@@Abstract"))
                     {
diff --git a/src/Dash/src/Dash/Engine/Repositories/DefaultModelRepository.cs b/src/Dash/src/Dash/Engine/Repositories/DefaultModelRepository.cs
index 655c2218..f595b214 100644
--- a/src/Dash/src/Dash/Engine/Repositories/DefaultModelRepository.cs
+++ b/src/Dash/src/Dash/Engine/Repositories/DefaultModelRepository.cs
@@ -41,10 +41,10 @@ public virtual EntityModel Get(string entityName)
                 throw new EntityModelNotFoundException($"Entity '{entityName}' was not found in the repository");
             }
 
-            return entity;
+            return entity!;
         }
 
-        public bool TryGet(string entityName, out EntityModel entityModel)
+        public bool TryGet(string entityName, out EntityModel? entityModel)
         {
             entityModel = _entityModels.SingleOrDefault(e => e.Name.IsSame(entityName));
             return entityModel != null;
diff --git a/src/Dash/src/Dash/Engine/Visitors/DefaultModelBuilder.cs b/src/Dash/src/Dash/Engine/Visitors/DefaultModelBuilder.cs
index dbb8157a..baef642f 100644
--- a/src/Dash/src/Dash/Engine/Visitors/DefaultModelBuilder.cs
+++ b/src/Dash/src/Dash/Engine/Visitors/DefaultModelBuilder.cs
@@ -45,7 +45,7 @@ public override Task Visit(AttributeDeclarationNode node)
                 var codeDataType = _codeLanguageProvider.Translate(result.DataType);
                 var databaseDataType = _databaseLanguageProvider.Translate(result.DataType);
 
-                entityModel.CodeAttributes.Add(new AttributeModel(node.AttributeName, result, codeDataType));
+                entityModel!.CodeAttributes.Add(new AttributeModel(node.AttributeName, result, codeDataType));
                 entityModel.DataAttributes.Add(new AttributeModel(node.AttributeName, result, databaseDataType));
             }
 
diff --git a/src/Dash/test/Dash.Tests/Common/HttpUriDownloaderTests.cs b/src/Dash/test/Dash.Tests/Common/HttpUriDownloaderTests.cs
index 537b075c..62ec69ef 100644
--- a/src/Dash/test/Dash.Tests/Common/HttpUriDownloaderTests.cs
+++ b/src/Dash/test/Dash.Tests/Common/HttpUriDownloaderTests.cs
@@ -85,7 +85,7 @@ public async Task Visit_UriNodeDownloadSuccess_ShouldReturnSuccessfulTuple()
             // Assert
             result.Success.Should().BeTrue();
             result.FileName.Should().Be("bar.csv");
-            result.Content.SequenceEqual(await stringContent.ReadAsByteArrayAsync()).Should().BeTrue();
+            result.Content.Should().NotBeNull().And.Subject.SequenceEqual(await stringContent.ReadAsByteArrayAsync()).Should().BeTrue();
         }
     }
 }
diff --git a/src/Dash/test/Dash.Tests/Dash.Tests.csproj b/src/Dash/test/Dash.Tests/Dash.Tests.csproj
index 8801d220..1e47c735 100644
--- a/src/Dash/test/Dash.Tests/Dash.Tests.csproj
+++ b/src/Dash/test/Dash.Tests/Dash.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
 
     <IsPackable>false</IsPackable>