diff --git a/chapter03/liff-blazor-todo-app/TodoBot.Client/TodoBot.Client.csproj b/chapter03/liff-blazor-todo-app/TodoBot.Client/TodoBot.Client.csproj
index e6cc5c1..43fe9d7 100644
--- a/chapter03/liff-blazor-todo-app/TodoBot.Client/TodoBot.Client.csproj
+++ b/chapter03/liff-blazor-todo-app/TodoBot.Client/TodoBot.Client.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="3.0.0-preview8.19405.7" PrivateAssets="all" />
     <PackageReference Include="Microsoft.AspNetCore.Blazor.DevServer" Version="3.0.0-preview8.19405.7" PrivateAssets="all" />
     <PackageReference Include="Microsoft.AspNetCore.Blazor.HttpClient" Version="3.0.0-preview8.19405.7" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/chapter03/liff-blazor-todo-app/TodoBot.Shared/TodoBot.Shared.csproj b/chapter03/liff-blazor-todo-app/TodoBot.Shared/TodoBot.Shared.csproj
index 3c32e80..b878ac3 100644
--- a/chapter03/liff-blazor-todo-app/TodoBot.Shared/TodoBot.Shared.csproj
+++ b/chapter03/liff-blazor-todo-app/TodoBot.Shared/TodoBot.Shared.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="4.6.0-preview8.19405.3" />
   </ItemGroup>