diff --git a/README.md b/README.md
index 7253875..fa1aa52 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,8 @@
 This crate lets you connect to and interact with servers that implement the IMAP protocol ([RFC
 3501](https://tools.ietf.org/html/rfc3501) and various extensions). After authenticating with
 the server, IMAP lets you list, fetch, and search for e-mails, as well as monitor mailboxes for
-changes.
+changes. It supports at least the latest three stable Rust releases (possibly even older ones;
+check the [CI results](https://travis-ci.org/jonhoo/rust-imap)).
 
 To connect, use the [`connect`] function. This gives you an unauthenticated [`Client`]. You can
 then use [`Client::login`] or [`Client::authenticate`] to perform username/password or
diff --git a/src/lib.rs b/src/lib.rs
index 6cf00bc..bd5e4f4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,8 @@
 //! This crate lets you connect to and interact with servers that implement the IMAP protocol ([RFC
 //! 3501](https://tools.ietf.org/html/rfc3501) and various extensions). After authenticating with
 //! the server, IMAP lets you list, fetch, and search for e-mails, as well as monitor mailboxes for
-//! changes.
+//! changes. It supports at least the latest three stable Rust releases (possibly even older ones;
+//! check the [CI results](https://travis-ci.org/jonhoo/rust-imap)).
 //!
 //! To connect, use the [`connect`] function. This gives you an unauthenticated [`Client`]. You can
 //! then use [`Client::login`] or [`Client::authenticate`] to perform username/password or