diff --git a/sample-apps/xamarin/acquaint-crm/Backend/app_acquaintService/packages.config b/sample-apps/xamarin/acquaint-crm/Backend/app_acquaintService/packages.config
old mode 100755
new mode 100644
index cd8548d4..939fca6f
--- a/sample-apps/xamarin/acquaint-crm/Backend/app_acquaintService/packages.config
+++ b/sample-apps/xamarin/acquaint-crm/Backend/app_acquaintService/packages.config
@@ -27,7 +27,7 @@
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
   <package id="Microsoft.WindowsAzure.ConfigurationManager" version="3.2.0" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
   <package id="Swashbuckle" version="5.0.0" targetFramework="net45" />
   <package id="Swashbuckle.Core" version="5.0.0" targetFramework="net45" />