diff --git a/Dockerfile b/Dockerfile
index 0ad8456..3c28a3e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM elixir:1.12.2-alpine AS build
+FROM elixir:1.13-alpine AS build
 
 # install build dependencies
 RUN apk add --no-cache build-base npm git python3
@@ -34,7 +34,7 @@ RUN mix do phx.digest, gettext.extract
 RUN mix do compile, release
 
 # prepare release image
-FROM alpine:3.9 AS app
+FROM alpine:latest AS app
 
 RUN apk upgrade --no-cache && \
     apk add --no-cache bash openssl libgcc libstdc++ ncurses-libs