diff --git a/src/code-listings/lesson-37/SuaveApp/packages.config b/src/code-listings/lesson-37/SuaveApp/packages.config
index fca4343..1dddd28 100644
--- a/src/code-listings/lesson-37/SuaveApp/packages.config
+++ b/src/code-listings/lesson-37/SuaveApp/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="FSharp.Core" version="4.0.0.1" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net461" />
   <package id="Suave" version="2.0.0" targetFramework="net452" />
 </packages>
\ No newline at end of file