diff --git a/Contributing.adoc b/Contributing.adoc
index f3cf4fdc3..80da272f8 100644
--- a/Contributing.adoc
+++ b/Contributing.adoc
@@ -29,8 +29,8 @@ please include:
   _WeeChat 1.7-dev (git: v1.6-6-g997f47f)_. +
   If WeeChat does not start at all, please include the version displayed by
   `weechat --help` (or the version installed with your package manager).
-* Your *operating system*: its name and version (examples: Linux Debian Wheezy,
-  FreeBSD 10.0, Windows/Cygwin 64-bit, Windows/Ubuntu 64-bit...).
+* Your *operating system*: its name and version (examples: Linux Debian Bullseye,
+  FreeBSD 13.0, Windows/Cygwin 64-bit, Windows/Ubuntu 64-bit...).
 * The *steps to reproduce*: if possible, please include a reproducible example:
   explain the steps which led you to the problem. +
   It's even better if you can reproduce the problem with a new config (and no