diff --git a/src/Tests/Tests.fsproj b/src/Tests/Tests.fsproj
index 13aea037..6ea02f46 100644
--- a/src/Tests/Tests.fsproj
+++ b/src/Tests/Tests.fsproj
@@ -35,7 +35,7 @@
     <Compile Include="Misc.fs" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="FSharp.SystemTextJson" Version="1.2.42" />
+    <PackageReference Include="FSharp.SystemTextJson" Version="1.3.13" />
     <PackageReference Include="FsUnit" Version="5.6.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />