diff --git a/Build/.nuke/build.schema.json b/Build/.nuke/build.schema.json
index 9454c2f..131f82f 100644
--- a/Build/.nuke/build.schema.json
+++ b/Build/.nuke/build.schema.json
@@ -127,11 +127,11 @@
         "Name": {
           "type": "string"
         },
-        "NugetApiKey": {
+        "NuGetApiKey": {
           "type": "string",
           "default": "Secrets must be entered via 'nuke :secrets [profile]'"
         },
-        "NugetApiUrl": {
+        "NuGetApiUrl": {
           "type": "string",
           "default": "Secrets must be entered via 'nuke :secrets [profile]'"
         },
@@ -168,7 +168,7 @@
         "TestResults": {
           "type": "boolean"
         },
-        "UnlistNuget": {
+        "UnlistNuGet": {
           "type": "boolean"
         }
       }
diff --git a/Build/Build.cs b/Build/Build.cs
index 76c5658..59f3a77 100644
--- a/Build/Build.cs
+++ b/Build/Build.cs
@@ -7,7 +7,7 @@ class Build : NukeBuild, IPublishPack, ICompileExample, ITest, IShowGitVersion,
 {
     public void ReleaseAsset(ReleaseAssets releaseAssets) { }
     IAssetRelease IHazAssetRelease.AssetRelease => new AssetRelease();
-    //bool IPack.UnlistNuget => true;
+    //bool IPack.UnlistNuGet => true;
     bool ITest.TestBuildStopWhenFailed => false;
     public static int Main() => Execute<Build>(x => x.From<IPublishPack>().Build);
 }
diff --git a/Build/ILocalAssetRelease.cs b/Build/ILocalAssetRelease.cs
index 197fcc6..2be931b 100644
--- a/Build/ILocalAssetRelease.cs
+++ b/Build/ILocalAssetRelease.cs
@@ -6,7 +6,7 @@ class AssetRelease : IAssetRelease
 {
     public void ReleaseAsset(ReleaseAssets releaseAssets)
     {
-        Serilog.Log.Information($"Project: {releaseAssets.Project.Name}");
+        Serilog.Log.Information($"Project: {releaseAssets.Project?.Name}");
         Serilog.Log.Information($"Version: {releaseAssets.Version}");
         Serilog.Log.Information($"Notes: {releaseAssets.Notes}");
         Serilog.Log.Information($"Prerelease: {releaseAssets.Prerelease}");
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bc1613..515c555 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.9.3] / 2025-03-20
+### Updated
+- Update `MainProject` to exception and message when null.
+
 ## [1.9.2] / 2025-01-19
 ### Updated
 - Add `NuGetTasks` delete, sign and verify.
@@ -400,6 +404,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - First Release
 
 [vNext]: ../../compare/1.0.0...HEAD
+[1.9.3]: ../../compare/1.9.2...1.9.3
 [1.9.2]: ../../compare/1.9.1...1.9.2
 [1.9.1]: ../../compare/1.9.0...1.9.1
 [1.9.0]: ../../compare/1.8.2...1.9.0
diff --git a/Directory.Build.props b/Directory.Build.props
index 33dd450..dc03046 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,5 +1,5 @@
 <Project>
 	<PropertyGroup>
-		<Version>1.9.2</Version>
+		<Version>1.9.3</Version>
 	</PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/ricaun.Nuke/Components/IHazMainProject.cs b/ricaun.Nuke/Components/IHazMainProject.cs
index f79b9a9..3d051b2 100644
--- a/ricaun.Nuke/Components/IHazMainProject.cs
+++ b/ricaun.Nuke/Components/IHazMainProject.cs
@@ -18,7 +18,7 @@ public interface IHazMainProject : IHazSolution, INukeBuild
         /// <summary>
         /// MainProject (default: <seealso cref="MainName"/>)
         /// </summary>
-        public Project MainProject => Solution.GetOtherProject(MainName);
+        public Project MainProject => Solution.GetOtherProject(MainName) ?? throw new System.Exception($"{nameof(MainProject)} is null using '{MainName}', use 'string {nameof(IHazMainProject)}.{nameof(MainName)} => \"YourMainProjectName\"'.");
 
         /// <summary>
         /// MainProject (default: <seealso cref="MainName"/>)