diff --git a/src/MyNihongo.FluentHttp.csproj b/src/MyNihongo.FluentHttp.csproj
index 1d002ce..46c51f6 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="8.0.3" />
 	</ItemGroup>
 
 	<ItemGroup>