diff --git a/RosBridgeClient/packages.config b/RosBridgeClient/packages.config
old mode 100755
new mode 100644
index b5a3a7b..4808ca6
--- a/RosBridgeClient/packages.config
+++ b/RosBridgeClient/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="WebSocketSharp" version="1.0.3-rc11" targetFramework="net45" />
 </packages>
\ No newline at end of file