diff --git a/MaybeError/MaybeError.csproj b/MaybeError/MaybeError.csproj
index 9f89f98..0e479bb 100644
--- a/MaybeError/MaybeError.csproj
+++ b/MaybeError/MaybeError.csproj
@@ -3,8 +3,16 @@
   <PropertyGroup>
 	<TargetFramework>net9.0</TargetFramework>
 	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">net9.0;net9.0-windows10.0.22621.0</TargetFrameworks>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
+	<ImplicitUsings>enable</ImplicitUsings>
+	<Nullable>enable</Nullable>
   </PropertyGroup>
 
+	<PropertyGroup>
+		<PackageId>MaybeError</PackageId>
+		<Version>1.0.0</Version>
+		<Authors>Amatsugu</Authors>
+		<PackageDescription>Errors as values</PackageDescription>
+		<RepositoryUrl>https://github.com/Amatsugu/MaybeError</RepositoryUrl>
+	</PropertyGroup>
+
 </Project>