diff --git a/lib/libes/es.vcxproj b/lib/libes/es.vcxproj
index c32ab08..fa5b849 100644
--- a/lib/libes/es.vcxproj
+++ b/lib/libes/es.vcxproj
@@ -128,6 +128,7 @@
     <ClInclude Include="include\es\sign.h" />
     <ClInclude Include="include\es\SignatureBlock.h" />
     <ClInclude Include="include\es\SignedData.h" />
+    <ClInclude Include="include\es\SignUtils.h" />
     <ClInclude Include="include\es\ticket.h" />
     <ClInclude Include="include\es\TicketBody_V2.h" />
   </ItemGroup>
@@ -135,6 +136,7 @@
     <ClCompile Include="source\CertificateBody.cpp" />
     <ClCompile Include="source\SectionHeader_V2.cpp" />
     <ClCompile Include="source\SignatureBlock.cpp" />
+    <ClCompile Include="source\SignUtils.cpp" />
     <ClCompile Include="source\TicketBody_V2.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/lib/libes/es.vcxproj.filters b/lib/libes/es.vcxproj.filters
index 653f976..7f614e2 100644
--- a/lib/libes/es.vcxproj.filters
+++ b/lib/libes/es.vcxproj.filters
@@ -36,6 +36,9 @@
     <ClInclude Include="include\es\SignedData.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="include\es\SignUtils.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="include\es\ticket.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -53,6 +56,9 @@
     <ClCompile Include="source\SignatureBlock.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="source\SignUtils.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="source\TicketBody_V2.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>