diff --git a/src/Docfx.HtmlToPdf/Docfx.HtmlToPdf.csproj b/src/Docfx.HtmlToPdf/Docfx.HtmlToPdf.csproj
index 3aab40c2156..24ca56a768b 100644
--- a/src/Docfx.HtmlToPdf/Docfx.HtmlToPdf.csproj
+++ b/src/Docfx.HtmlToPdf/Docfx.HtmlToPdf.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <ItemGroup>
     <Compile Remove="Manifest.cs" />
     <Compile Remove="ManifestItem.cs" />
@@ -12,7 +12,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Docfx.Build.Common\Docfx.Build.Common.csproj" />
-    <ProjectReference Include="..\Docfx.Build.ConceptualDocuments\Docfx.Build.ConceptualDocuments.csproj" />
     <ProjectReference Include="..\Docfx.Common\Docfx.Common.csproj" />
   </ItemGroup>
 </Project>
\ No newline at end of file