diff --git a/src/Tests/Tests.fsproj b/src/Tests/Tests.fsproj
index 9c4ad1e6..a7c53265 100644
--- a/src/Tests/Tests.fsproj
+++ b/src/Tests/Tests.fsproj
@@ -37,7 +37,7 @@
   <ItemGroup>
     <PackageReference Include="FsUnit" Version="6.0.1" />
     <PackageReference Include="NUnit" Version="4.0.1" />
-    <PackageReference Include="FSharp.SystemTextJson" Version="1.3.13" />
+    <PackageReference Include="FSharp.SystemTextJson" Version="1.4.36" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Suave" Version="2.6.2" />