diff --git a/samples/XRPC.WPF/Client/packages.config b/samples/XRPC.WPF/Client/packages.config
index b33e41b..8c955c1 100644
--- a/samples/XRPC.WPF/Client/packages.config
+++ b/samples/XRPC.WPF/Client/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="BeetleX" version="1.4.8" targetFramework="net472" />
   <package id="BeetleX.XRPC.Clients" version="0.8.2.3" targetFramework="net472" />
-  <package id="MessagePack" version="2.0.323" targetFramework="net472" />
+  <package id="MessagePack" version="2.1.80" targetFramework="net472" />
   <package id="MessagePack.Annotations" version="2.0.323" targetFramework="net472" />
   <package id="MessagePackAnalyzer" version="2.0.323" targetFramework="net472" />
   <package id="Newtonsoft.Json" version="12.0.3" targetFramework="net472" />