diff --git a/mail-server/dovecot.nix b/mail-server/dovecot.nix
index e1d927a..b3feeaa 100644
--- a/mail-server/dovecot.nix
+++ b/mail-server/dovecot.nix
@@ -362,7 +362,7 @@ in
         ssl = required
         ssl_min_protocol = TLSv1.2
         ssl_prefer_server_ciphers = no
-        ssl_curve_list = X25519:prime256v1:secp384r1
+        ssl_curve_list = X25519MLKEM768:X25519:prime256v1:secp384r1
 
         service lmtp {
           unix_listener dovecot-lmtp {