diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba3ca8b..2dfa2b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
-# devel
+# 4.2.1 (2021-05-03)
+
+This will probably be the last pre-Odyssey release. I am not in the Odyssey
+alpha, and I have no ETA on a compatibility release. Please do file issues you
+encounter regardless.
 
 Changes to the RATSIGNAL produced by Swiftsqueak broke not only the parsing, but
 also the default string used to detect them in AdiIRC. You’ll need to listen to