diff --git a/mail/Dockerfile b/mail/Dockerfile
index 35a9bcc..0067f72 100644
--- a/mail/Dockerfile
+++ b/mail/Dockerfile
@@ -28,8 +28,8 @@ RUN apk add --no-cache \
     php81-mbstring=8.1.27-r0 \
     php81-mysqli=8.1.27-r0 \
     php81-pdo_mysql=8.1.27-r0 \
-    postfix=3.8.3-r1 \
-    postfix-mysql=3.8.3-r1 \
+    postfix=3.8.4-r0 \
+    postfix-mysql=3.8.4-r0 \
     dovecot=2.3.21-r17 \
     dovecot-lmtpd=2.3.21-r17 \
     dovecot-mysql=2.3.21-r17 \