diff --git a/public/fs/etc/postfix/main.cf.in b/public/fs/etc/postfix/main.cf.in
index 9953c29..6163967 100644
--- a/public/fs/etc/postfix/main.cf.in
+++ b/public/fs/etc/postfix/main.cf.in
@@ -4,11 +4,11 @@ mydomain                = @smtphost@
 myorigin                = $mydomain
 mydestination           = $mydomain, localhost.$mydomain, localhost, @server_domains@
 
-alias_maps              = hash:/etc/aliases
-alias_database          = hash:/etc/aliases
+alias_maps              = lmdb:/etc/aliases
+alias_database          = lmdb:/etc/aliases
 
 virtual_alias_domains   = @mailing_lists@
-virtual_alias_maps      = hash:/etc/virtual
+virtual_alias_maps      = lmdb:/etc/virtual
 
 compatibility_level     = 2