diff --git a/LinqFasterer.Tests/LinqFasterer.Tests.csproj b/LinqFasterer.Tests/LinqFasterer.Tests.csproj
index 89c4ca3..704a3c0 100644
--- a/LinqFasterer.Tests/LinqFasterer.Tests.csproj
+++ b/LinqFasterer.Tests/LinqFasterer.Tests.csproj
@@ -16,7 +16,7 @@
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+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
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     <PackageReference Include="xunit.assert" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">