diff --git a/Dockerfile b/Dockerfile
index 106b096..b18e165 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM thallian/confd-env:latest
 
-RUN	apk add --no-cache postfix postfix-ldap
+RUN	apk add --no-cache postfix postfix-ldap bash
 
 EXPOSE 25 587
 
diff --git a/rootfs/etc/services.d/postfix/run b/rootfs/etc/services.d/postfix/run
index d2daf8c..e4582f6 100644
--- a/rootfs/etc/services.d/postfix/run
+++ b/rootfs/etc/services.d/postfix/run
@@ -1,4 +1,4 @@
-#!/usr/bin/with-contenv sh
+#!/usr/bin/with-contenv bash
 
 trap "postfix stop" SIGINT
 trap "postfix stop" SIGTERM