diff --git a/Dockerfile b/Dockerfile
index 16198be..f48a1cd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11
+FROM alpine:3.12
 
 
 ARG ARG_POSTFIX_VERSION
diff --git a/conf.env b/conf.env
index 5be1b51..6d12d51 100644
--- a/conf.env
+++ b/conf.env
@@ -1,2 +1,2 @@
-POSTFIX_VERSION=3.4.12-r0
+POSTFIX_VERSION=3.5.2-r1
 DOCKER_IMAGE=dcarrillo/postfix