diff --git a/modules/services/docker-mailserver/default.nix b/modules/services/docker-mailserver/default.nix
index ac02e02..0f8b251 100644
--- a/modules/services/docker-mailserver/default.nix
+++ b/modules/services/docker-mailserver/default.nix
@@ -7,7 +7,7 @@
 }:
 let
   cfg = config.services.az-mailserver;
-  version = "13.2.0";
+  version = "13.3.1";
   mailserver-setup =
     (pkgs.writeScriptBin "mailserver-setup" "${builtins.readFile (
       pkgs.fetchurl {