diff --git a/Lombiq.BaseTheme/Lombiq.BaseTheme.csproj b/Lombiq.BaseTheme/Lombiq.BaseTheme.csproj
index 7607f2b..ac18d73 100644
--- a/Lombiq.BaseTheme/Lombiq.BaseTheme.csproj
+++ b/Lombiq.BaseTheme/Lombiq.BaseTheme.csproj
@@ -60,7 +60,7 @@
 
   <ItemGroup Condition="'$(NuGetBuild)' == 'true'">
     <PackageReference Include="Lombiq.HelpfulLibraries" Version="12.0.0" />
-    <PackageReference Include="Lombiq.HelpfulExtensions" Version="9.0.1-alpha.0.osoe-903" />
+    <PackageReference Include="Lombiq.HelpfulExtensions" Version="10.0.0" />
     <PackageReference Include="Lombiq.NodeJs.Extensions" Version="2.1.0" />
     <PackageReference Include="Lombiq.HelpfulLibraries.SourceGenerators" Version="12.0.0" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
     <PackageReference Include="Lombiq.HelpfulLibraries.Attributes" Version="12.0.0" OutputItemType="Analyzer" ReferenceOutputAssembly="true" />