diff --git a/Cargo.toml b/Cargo.toml
index 796490f..7abd9c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hls_m3u8"
-version = "0.2.1"
+version = "0.2.1" # remember to update html_root_url
 authors = ["Takeru Ohta <phjgt308@gmail.com>"]
 description = "HLS m3u8 parser/generator"
 homepage = "https://github.com/sile/hls_m3u8"
diff --git a/src/lib.rs b/src/lib.rs
index 70edb06..259849e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+#![doc(html_root_url = "https://docs.rs/hls_m3u8/0.2.1")]
 #![forbid(unsafe_code)]
 #![warn(
     clippy::pedantic, //