diff --git a/Ymir.slnx b/Ymir.slnx
index 63de4d7..a793caa 100644
--- a/Ymir.slnx
+++ b/Ymir.slnx
@@ -8,5 +8,5 @@
     <Project Path="tests/Ymir.Box3D.Parity/Ymir.Box3D.Parity.csproj" />
     <Project Path="tests/Ymir.Tests/Ymir.Tests.csproj" />
   </Folder>
-  <Project Path="../CultMath/src/CultMath/CultMath.csproj" />
+  <Project Path="../CultLib/packages/cultmath/src/CultMath/CultMath.csproj" />
 </Solution>
diff --git a/src/Ymir.Core/Ymir.Core.csproj b/src/Ymir.Core/Ymir.Core.csproj
index 1ca4b6f..6518910 100644
--- a/src/Ymir.Core/Ymir.Core.csproj
+++ b/src/Ymir.Core/Ymir.Core.csproj
@@ -11,7 +11,7 @@
     <ProjectReference Include="$(CultLibRoot)\src\GameCult.Caching.MessagePack\GameCult.Caching.MessagePack.csproj" />
     <ProjectReference Include="$(EveRoot)\packages\org.gamecult.eve.surface\GameCult.Eve.Surface.csproj"
                       AdditionalProperties="CultLibRoot=$(CultLibRoot)" />
-    <ProjectReference Include="..\..\..\CultMath\src\CultMath\CultMath.csproj" />
+    <ProjectReference Include="$(CultLibRoot)\packages\cultmath\src\CultMath\CultMath.csproj" />
   </ItemGroup>
 
   <PropertyGroup>