diff --git a/.env b/.env
index 219d3a8..93384f3 100644
--- a/.env
+++ b/.env
@@ -86,5 +86,5 @@ ATHENAPDF_TAG=2.16.0
 MEMCACHED_TAG=1-2.16.6
 RSYSLOG_TAG=latest
 WEBGRIND_TAG=1-1.30.1
-OPENSMTPD_TAG=6-1.20.1
+OPENSMTPD_TAG=6-1.21.0
 XHPROF_TAG=3.7.6