diff --git a/DotNetSolutionTools.App/Views/MainWindow.axaml b/DotNetSolutionTools.App/Views/MainWindow.axaml
index b331461..416b8bf 100644
--- a/DotNetSolutionTools.App/Views/MainWindow.axaml
+++ b/DotNetSolutionTools.App/Views/MainWindow.axaml
@@ -106,7 +106,7 @@
                         IsEnabled="{Binding SolutionFilePath, Mode=OneWay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
                         Command="{Binding UpdateAllProjectsToNet80Command}">
                     <TextBlock TextWrapping="Wrap">
-                        Update all projects in Solution to .NET 8.0
+                        Update all projects in Solution to .NET 9.0
                     </TextBlock>
                 </Button>
                 <Button Grid.Row="2" Grid.Column="2" MinHeight="100" Padding="10" Margin="5"
@@ -115,7 +115,7 @@
                         IsEnabled="{Binding CsprojFilePath, Mode=OneWay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
                         Command="{Binding UpdateProjectToNet80Command}">
                     <TextBlock TextWrapping="Wrap">
-                        Update C# Project to .NET 8.0
+                        Update C# Project to .NET 9.0
                     </TextBlock>
                 </Button>
                 <Button Grid.Row="3" Grid.Column="0" MinHeight="100" Padding="10" Margin="5"
diff --git a/DotNetSolutionTools.CLI/Commands/UpdateProjectToNet80Command.cs b/DotNetSolutionTools.CLI/Commands/UpdateProjectToNet80Command.cs
index e31a8c3..e7df157 100644
--- a/DotNetSolutionTools.CLI/Commands/UpdateProjectToNet80Command.cs
+++ b/DotNetSolutionTools.CLI/Commands/UpdateProjectToNet80Command.cs
@@ -18,7 +18,7 @@ public class UpdateProjectToNet80Command : AsyncCommand<UpdateProjectToNet80Comm
             Console.WriteLine("Invalid file path. Please pass in a valid file path to a .csproj file.");
             return 1;
         }
-        Console.WriteLine("Upgrading project to .NET 8.0");
+        Console.WriteLine("Upgrading project to .NET 9.0");
         await DotNetUpgrade.UpdateProjectAtPathToNet80(settings.CsprojFilePath);
 
         Console.WriteLine("==================================================");
diff --git a/DotNetSolutionTools.CLI/Commands/UpdateSlnToNet80Command.cs b/DotNetSolutionTools.CLI/Commands/UpdateSlnToNet80Command.cs
index 5064735..9847423 100644
--- a/DotNetSolutionTools.CLI/Commands/UpdateSlnToNet80Command.cs
+++ b/DotNetSolutionTools.CLI/Commands/UpdateSlnToNet80Command.cs
@@ -18,7 +18,7 @@ public class UpdateSlnToNet80Command : AsyncCommand<UpdateSlnToNet80Command.Sett
             Console.WriteLine("Invalid file path. Please pass in a valid file path to a .csproj file.");
             return 1;
         }
-        Console.WriteLine("Upgrading project to .NET 8.0");
+        Console.WriteLine("Upgrading project to .NET 9.0");
         await DotNetUpgrade.UpdateProjectsInSolutionToNet80(settings.SolutionFilePath);
 
         Console.WriteLine("==================================================");
diff --git a/DotNetSolutionTools.Core/DotNetUpgrade.cs b/DotNetSolutionTools.Core/DotNetUpgrade.cs
index 98bf695..7212432 100644
--- a/DotNetSolutionTools.Core/DotNetUpgrade.cs
+++ b/DotNetSolutionTools.Core/DotNetUpgrade.cs
@@ -33,11 +33,11 @@ public static class DotNetUpgrade
         var targetFramework = project
             .PropertyGroups.SelectMany(x => x.Properties)
             .FirstOrDefault(x => x.Name == "TargetFramework");
-        if (targetFramework?.Value is "net8.0" or "net7.0" or "net6.0" or "net5.0")
+        if (targetFramework?.Value is "net9.0" or "net8.0" or "net7.0" or "net6.0" or "net5.0")
         {
-            if (targetFramework.Value is not "net8.0")
+            if (targetFramework.Value is not "net9.0")
             {
-                targetFramework.Value = "net8.0";
+                targetFramework.Value = "net9.0";
                 project.Save();
                 FormatCsproj.FormatCsprojFile(project.FullPath);
             }