diff --git a/ascom-observingconditions/KomaObservingConditions/packages.config b/ascom-observingconditions/KomaObservingConditions/packages.config
index d4d9e6f..0975978 100644
--- a/ascom-observingconditions/KomaObservingConditions/packages.config
+++ b/ascom-observingconditions/KomaObservingConditions/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="8.0.2" targetFramework="net40-Client" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net40-Client" />
 </packages>
\ No newline at end of file