diff --git a/Cargo.toml b/Cargo.toml
index b07c952..6781512 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "trie-match"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 rust-version = "1.60"
 authors = [
diff --git a/README.md b/README.md
index f675e6a..c7c1b47 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,8 @@
 [![Build Status](https://github.com/daac-tools/trie-match/actions/workflows/rust.yml/badge.svg)](https://github.com/daac-tools/trie-match/actions)
 [![Slack](https://img.shields.io/badge/join-chat-brightgreen?logo=slack)](https://join.slack.com/t/daac-tools/shared_invite/zt-1pwwqbcz4-KxL95Nam9VinpPlzUpEGyA)
 
-This macro speeds up Rust's `match` expression when it compares strings.
+This macro speeds up Rust's `match` expression for comparing strings by using a
+compact double-array data structure.
 
 ## Usage
 
@@ -65,6 +66,7 @@ to achieve efficient state-to-state traversal, and the time complexity becomes
 
 The followings are different from the normal `match` expression:
 
+* Only supports string comparison.
 * The wildcard is evaluated last. (The normal `match` expression does not
   match patterns after the wildcard.)
 * Pattern bindings are unavailable.
diff --git a/src/lib.rs b/src/lib.rs
index 7f7c7a4..7dd6d15 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 //! # `trie_match! {}`
 //!
-//! This macro uses a compact double array trie for Rust's `match` expression to
-//! speed up conditional branching by strings.
+//! This macro speeds up Rust's `match` expression for comparing strings by using a compact
+//! double-array data structure.
 //!
 //! ## Usage
 //!
@@ -28,6 +28,7 @@
 //!
 //! The followings are different from the normal `match` expression:
 //!
+//! * Only supports string comparison.
 //! * The wildcard is evaluated last. (The normal `match` expression does not
 //!   match patterns after the wildcard.)
 //! * Pattern bindings are unavailable.