diff --git a/GTiff2Tiles.Avalonia/GTiff2Tiles.Avalonia.csproj b/GTiff2Tiles.Avalonia/GTiff2Tiles.Avalonia.csproj
index b03003d5..8a1773ea 100644
--- a/GTiff2Tiles.Avalonia/GTiff2Tiles.Avalonia.csproj
+++ b/GTiff2Tiles.Avalonia/GTiff2Tiles.Avalonia.csproj
@@ -7,11 +7,11 @@
 
     <ItemGroup>
         <!-- External dependencies -->
-        <PackageReference Include="Avalonia" Version="11.3.13" />
-        <PackageReference Include="Avalonia.Desktop" Version="11.3.13" />
+        <PackageReference Include="Avalonia" Version="12.0.0" />
+        <PackageReference Include="Avalonia.Desktop" Version="12.0.0" />
         <PackageReference Include="Avalonia.Diagnostics" Version="11.3.13" />
         <PackageReference Include="Avalonia.ReactiveUI" Version="11.3.8" />
-        <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.13" />
+        <PackageReference Include="Avalonia.Themes.Fluent" Version="12.0.0" />
         <PackageReference Include="DialogHost.Avalonia" Version="0.11.0" />
         <PackageReference Include="MaxRev.Gdal.Universal" Version="3.12.3.496" />
         <PackageReference Include="NetVips.Native" Version="8.18.2" />
diff --git a/GTiff2Tiles.Tests/GTiff2Tiles.Tests.csproj b/GTiff2Tiles.Tests/GTiff2Tiles.Tests.csproj
index 4ddd5f05..26e93800 100644
--- a/GTiff2Tiles.Tests/GTiff2Tiles.Tests.csproj
+++ b/GTiff2Tiles.Tests/GTiff2Tiles.Tests.csproj
@@ -22,7 +22,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="NUnit.Analyzers" Version="4.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
   </ItemGroup>
 
   <ItemGroup>