diff --git a/NexusClient/HandlerTests/packages.config b/NexusClient/HandlerTests/packages.config
index b3f53a5..9896ed2 100644
--- a/NexusClient/HandlerTests/packages.config
+++ b/NexusClient/HandlerTests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MessagePack" version="2.1.80" targetFramework="net471" />
+  <package id="MessagePack" version="2.1.90" targetFramework="net471" />
   <package id="MessagePack.Annotations" version="2.1.80" targetFramework="net471" />
   <package id="MessagePack.ImmutableCollection" version="2.1.80" targetFramework="net471" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.1.0" targetFramework="net471" />