diff --git a/tests/Demo.Wcf.ServiceTests/Demo.WcfServiceTests.csproj b/tests/Demo.Wcf.ServiceTests/Demo.WcfServiceTests.csproj
index 23f9814..a769337 100644
--- a/tests/Demo.Wcf.ServiceTests/Demo.WcfServiceTests.csproj
+++ b/tests/Demo.Wcf.ServiceTests/Demo.WcfServiceTests.csproj
@@ -9,7 +9,7 @@
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
       <PrivateAssets>all</PrivateAssets>