diff --git a/learnin.csproj b/learnin.csproj
index db88a8d..01135a6 100644
--- a/learnin.csproj
+++ b/learnin.csproj
@@ -2,4 +2,7 @@
   <PropertyGroup>
     <TargetFramework>net472</TargetFramework>
   </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="vim.math3d" Version="1.6.0" />
+  </ItemGroup>
 </Project>
\ No newline at end of file