diff --git a/MessagePackReview/MessagePackReview/MessagePackReview.csproj b/MessagePackReview/MessagePackReview/MessagePackReview.csproj
index bc56298..36e2213 100644
--- a/MessagePackReview/MessagePackReview/MessagePackReview.csproj
+++ b/MessagePackReview/MessagePackReview/MessagePackReview.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MessagePack" Version="1.7.3.4" />
+    <PackageReference Include="MessagePack" Version="1.9.3" />
   </ItemGroup>
 
 </Project>