diff --git a/Dockerfile b/Dockerfile
index 045b48a..6a3d6b0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM alpine:3.12 AS build
+FROM alpine:3.12.3 AS build
 RUN apk add --no-cache tzdata
 
-FROM alpine:3.12
+FROM alpine:3.12.3
 MAINTAINER "f <f@sutty.nl>"
 
 # TODO: We don't want to receive lots of email, so we'll change this to