diff --git a/src/netstandard/NewtonsoftMessagePack/NewtonsoftMessagePack.csproj b/src/netstandard/NewtonsoftMessagePack/NewtonsoftMessagePack.csproj
index 186ee48..2096151 100644
--- a/src/netstandard/NewtonsoftMessagePack/NewtonsoftMessagePack.csproj
+++ b/src/netstandard/NewtonsoftMessagePack/NewtonsoftMessagePack.csproj
@@ -15,7 +15,7 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
 </Project>