diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17cf90e..73e1711 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ files module, removed string module, etc.
     headings that (pointlessly?) previously divided the changelog into v0.3, v0.2, and v0.1
   - A few minor grammar tweaks and reorganisations
 - Replaced [`cached`] dependency with a simple HashMap-backed store
+- Use [`once_cell`]'s `Lazy` instead of its `OnceCell` for the `MIMEDB` const
 
 ## v0.3.6 - 2021-08-16
 ### Other
@@ -250,6 +251,7 @@ Initial commit!
 [`infer`]: https://crates.io/crates/infer
 [`mime_guess`]: https://crates.io/crates/mime_guess
 [`new_mime_guess`]: https://crates.io/crates/new_mime_guess
+[`once_cell`]: https://crates.io/crates/once_cell
 [`snailquote`]: https://crates.io/crates/snailquote
 [`structopt`]: https://crates.io/crates/structopt
 [`xdg-mime`]: https://crates.io/crates/xdg-mime