diff --git a/ACMESharp/ACMESharp-test/packages.config b/ACMESharp/ACMESharp-test/packages.config
index b81720e7..985585ec 100644
--- a/ACMESharp/ACMESharp-test/packages.config
+++ b/ACMESharp/ACMESharp-test/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="secure-file" version="1.0.31" targetFramework="net45" />
 </packages>
\ No newline at end of file