diff --git a/Libplanet.Tests/Libplanet.Tests.csproj b/Libplanet.Tests/Libplanet.Tests.csproj
index daf59f7128c..2fc5451be0a 100644
--- a/Libplanet.Tests/Libplanet.Tests.csproj
+++ b/Libplanet.Tests/Libplanet.Tests.csproj
@@ -63,6 +63,7 @@
   <ItemGroup>
     <ProjectReference Include="..\Libplanet\Libplanet.csproj" />
     <ProjectReference Include="..\Libplanet.Store\Libplanet.Store.csproj" />
+    <ProjectReference Include="..\Libplanet.Types\Libplanet.Types.csproj" />
     <ProjectReference Include="..\Libplanet.Action.Tests\Libplanet.Action.Tests.csproj" />
   </ItemGroup>