diff --git a/liff-client-csharp/liff-client-csharp.csproj b/liff-client-csharp/liff-client-csharp.csproj
index 5576ba2..4a19178 100644
--- a/liff-client-csharp/liff-client-csharp.csproj
+++ b/liff-client-csharp/liff-client-csharp.csproj
@@ -36,7 +36,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.JSInterop.WebAssembly" Version="3.2.0" />
-    <PackageReference Include="System.Text.Json" Version="4.7.2" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 
 </Project>