diff --git a/src/MyNihongo.FluentHttp.csproj b/src/MyNihongo.FluentHttp.csproj
index 5057850..a32f602 100644
--- a/src/MyNihongo.FluentHttp.csproj
+++ b/src/MyNihongo.FluentHttp.csproj
@@ -27,7 +27,7 @@
 	</ItemGroup>
 
 	<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1'">
-		<PackageReference Include="System.Text.Json" Version="8.0.0" />
+		<PackageReference Include="System.Text.Json" Version="9.0.1" />
 	</ItemGroup>
 
 	<ItemGroup>
diff --git a/tests/MyNihongo.FluentHttp.Tests.Integration/MyNihongo.FluentHttp.Tests.Integration.csproj b/tests/MyNihongo.FluentHttp.Tests.Integration/MyNihongo.FluentHttp.Tests.Integration.csproj
index 54e5603..9e29048 100644
--- a/tests/MyNihongo.FluentHttp.Tests.Integration/MyNihongo.FluentHttp.Tests.Integration.csproj
+++ b/tests/MyNihongo.FluentHttp.Tests.Integration/MyNihongo.FluentHttp.Tests.Integration.csproj
@@ -9,7 +9,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="FluentAssertions" Version="[7.2.0]" />
-		<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
+		<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
 		<PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />