diff --git a/Dockerfile b/Dockerfile
index fc5dded..baf6bbc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mailserver2/debian-mail-overlay:1.0.19
+FROM mailserver2/debian-mail-overlay:1.0.20
 
 LABEL description="Simple and full-featured mail server using Docker"