diff --git a/zzre.sourcegen/zzre.sourcegen.csproj b/zzre.sourcegen/zzre.sourcegen.csproj
index 9928e5a0..88dc3da3 100644
--- a/zzre.sourcegen/zzre.sourcegen.csproj
+++ b/zzre.sourcegen/zzre.sourcegen.csproj
@@ -14,6 +14,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="System.Numerics.Vectors" Version="4.5.0" />
   </ItemGroup>
 
 </Project>