diff --git a/2.1KeyEncryption/packages.config b/2.1KeyEncryption/packages.config
index 967a180..3c7e0cd 100644
--- a/2.1KeyEncryption/packages.config
+++ b/2.1KeyEncryption/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NBitcoin" version="3.0.0.33" targetFramework="net451" />
-  <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
 </packages>
\ No newline at end of file