diff --git a/data/itoa.toml b/data/itoa.toml
new file mode 100644
index 0000000..5a95e34
--- /dev/null
+++ b/data/itoa.toml
@@ -0,0 +1,6 @@
+description = """
+The core library provides `core::fmt::NumBuffer` (stable since Rust 1.98), \
+which lets you replace `itoa::Buffer` to achieve the same functionalities \
+and remove the dependency.
+"""
+url = "https://doc.rust-lang.org/nightly/core/fmt/struct.NumBuffer.html"