diff --git a/csharp-read-write-sheet/packages.config b/csharp-read-write-sheet/packages.config
index 148bc7c..1cb04d4 100644
--- a/csharp-read-write-sheet/packages.config
+++ b/csharp-read-write-sheet/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net452" />
   <package id="NLog" version="4.5.3" targetFramework="net452" />
   <package id="NLog.Config" version="4.5.3" targetFramework="net452" />
   <package id="NLog.Schema" version="4.5.3" targetFramework="net452" />