diff --git a/Diffbot.Api.Client/NuGet/packages.config b/Diffbot.Api.Client/NuGet/packages.config
old mode 100755
new mode 100644
index 1ff14e2..a829ffc
--- a/Diffbot.Api.Client/NuGet/packages.config
+++ b/Diffbot.Api.Client/NuGet/packages.config
@@ -3,5 +3,5 @@
   <package id="Microsoft.Bcl" version="1.0.19" targetFramework="net40" />
   <package id="Microsoft.Bcl.Async" version="1.0.165" targetFramework="net40" />
   <package id="Microsoft.Bcl.Build" version="1.0.13" targetFramework="net40" />
-  <package id="Newtonsoft.Json" version="5.0.8" targetFramework="net40" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net40" />
 </packages>
\ No newline at end of file