diff --git a/Dockerfile b/Dockerfile
index a30bd7d..dccf119 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM alpine:3.8
+FROM alpine:3.9
 LABEL maintainer="Sebastian Hugentobler <sebastian@vanwa.ch>"
 
-ENV S6_OVERLAY_VERSION=v1.21.7.0
+ENV S6_OVERLAY_VERSION=v1.21.8.0
 
 RUN apk --no-cache add libressl syslog-ng
 RUN wget -qO- https://github.com/just-containers/s6-overlay/releases/download/$S6_OVERLAY_VERSION/s6-overlay-amd64.tar.gz | tar -xz -C /