diff --git a/csharp/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting.csproj b/csharp/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting.csproj
old mode 100755
new mode 100644
index e80307e..42f7cdc
--- a/csharp/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting.csproj
+++ b/csharp/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting/SCNorth.PropertyBasedTesting.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="8.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>