diff --git a/Dockerfile b/Dockerfile
index a5ade4c4..33dfec9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mailserver2/debian-mail-overlay:1.0.3
+FROM mailserver2/debian-mail-overlay:1.0.4
 
 LABEL description="Simple and full-featured mail server using Docker"