diff --git a/MessagePackTools.csproj b/MessagePackTools.csproj
index d668505..7427af1 100644
--- a/MessagePackTools.csproj
+++ b/MessagePackTools.csproj
@@ -26,7 +26,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="MessagePack" Version="2.5.198" />
+      <PackageReference Include="MessagePack" Version="3.1.4" />
     </ItemGroup>
 
 </Project>