diff --git a/README.md b/README.md
index 0c893c5..fa11a05 100644
--- a/README.md
+++ b/README.md
@@ -40,5 +40,6 @@ behaviour which is much better achieved with Sieve will be implemented, e.g.
 # Credits
 
 * Julian Klode for the [original code](https://github.com/julian-klode/ansible.jak-linux.org/blob/dovecot/roles/mailserver/files/usr/local/lib/dovecot-sieve-filters/gpgmymail)
-* revsuine for modifications to gpgmymail
+* revsuine for modifications to gpgmymail, mostly to make it work well with
+  Thunderbird