diff --git a/samples/wpf/ThinkGeoCloudElevationSample/packages.config b/samples/wpf/ThinkGeoCloudElevationSample/packages.config
index 26c26dd..8318968 100644
--- a/samples/wpf/ThinkGeoCloudElevationSample/packages.config
+++ b/samples/wpf/ThinkGeoCloudElevationSample/packages.config
@@ -3,7 +3,7 @@
   <package id="LiveCharts" version="0.9.7" targetFramework="net46" />
   <package id="LiveCharts.Wpf" version="0.9.7" targetFramework="net46" />
   <package id="Microsoft.Data.Sqlite.Core" version="3.1.0" targetFramework="net47" />
-  <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net45" />
   <package id="SQLitePCLRaw.bundle_e_sqlite3" version="2.0.2" targetFramework="net47" />
   <package id="SQLitePCLRaw.core" version="2.0.2" targetFramework="net47" />
   <package id="SQLitePCLRaw.lib.e_sqlite3" version="2.0.2" targetFramework="net47" />