diff --git a/php-phpmailer6.spec b/php-phpmailer6.spec
index ebfa3ab..d828cce 100644
--- a/php-phpmailer6.spec
+++ b/php-phpmailer6.spec
@@ -7,7 +7,7 @@
 # Please preserve changelog entries
 #
 # Github
-%global gh_commit    4a08cf4cdd2c38d12ee2b9fa69e5d235f37a6dcb
+%global gh_commit    050d430203105c27c30efd1dce7aa421ad882d01
 %global gh_short     %(c=%{gh_commit}; echo ${c:0:7})
 %global gh_owner     PHPMailer
 %global gh_project   PHPMailer
@@ -23,7 +23,7 @@
 %global php_home     %{_datadir}/php
 
 Name:           php-%{pk_project}%{major}
-Version:        6.3.0
+Version:        6.4.0
 Release:        1%{?dist}
 Summary:        Full-featured email creation and transfer class for PHP
 
@@ -75,7 +75,11 @@ Requires:       php-filter
 Requires:       php-hash
 # from phpcompatinfo report on version 6.1.3
 Requires:       php-date
+%if 0%{?fedora} >= 27 || 0%{?rhel} >= 8
 Recommends:     php-imap
+%else
+Requires:       php-imap
+%endif
 Requires:       php-intl
 Requires:       php-mbstring
 Requires:       php-openssl
@@ -200,6 +204,9 @@ exit $ret
 
 
 %changelog
+* Thu Apr  1 2021 Remi Collet <remi@remirepo.net> - 6.4.0-1
+- update to 6.4.0
+
 * Wed Feb 24 2021 Remi Collet <remi@remirepo.net> - 6.3.0-1
 - update to 6.3.0
 - php-imap is optional
diff --git a/sources b/sources
index 1d731cf..649508b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (php-phpmailer6-6.3.0-4a08cf4.tgz) = c279d4c3f7533e186eccdf25b491572130fc0af3dfd773b28b2e7e34698fa1670243036f6b3c9cb93bd3f2ed8a4425ddfc11a2f803f2032ba70912dfd0544288
+SHA512 (php-phpmailer6-6.4.0-050d430.tgz) = 9b2912d6e620c03e5806a727ebada5b6ec90ed6292d848018ab6106f4dd5bb8b771159a7638ec91f3aed3ceccf11ff398b4e2665a5d99710eec3049f81e2c9f9