diff --git a/gnupg/README b/gnupg/README
index 0f8472f07..b380f68c3 100644
--- a/gnupg/README
+++ b/gnupg/README
@@ -8,6 +8,7 @@ REQUIREMENTS
   - postfix
   - sendmail
   - msmtp
+  - exim
 
 PRE-INSTALL