diff --git a/src/NMockaroo.Tests/NMockaroo.Tests.csproj b/src/NMockaroo.Tests/NMockaroo.Tests.csproj
index 81c95db..8b76028 100644
--- a/src/NMockaroo.Tests/NMockaroo.Tests.csproj
+++ b/src/NMockaroo.Tests/NMockaroo.Tests.csproj
@@ -8,7 +8,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />