diff --git a/blockchain-workbench/rest-api-samples/dotnet/Workbench.Client.csproj b/blockchain-workbench/rest-api-samples/dotnet/Workbench.Client.csproj
old mode 100755
new mode 100644
index 93fbea0a1..ea5a177e6
--- a/blockchain-workbench/rest-api-samples/dotnet/Workbench.Client.csproj
+++ b/blockchain-workbench/rest-api-samples/dotnet/Workbench.Client.csproj
@@ -13,7 +13,7 @@
     <Folder Include="Models\" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Polly" Version="5.8.0" />
   </ItemGroup>
   <ItemGroup>