diff --git a/createsend-dotnet/packages.config b/createsend-dotnet/packages.config
index d2a4380..8928541 100644
--- a/createsend-dotnet/packages.config
+++ b/createsend-dotnet/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net4" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net4" />
 </packages>
\ No newline at end of file