diff --git a/Dockerfile b/Dockerfile
index feda907..2efa7cb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM docker.io/alpine:3.16 AS builder
+FROM docker.io/alpine:3.17 AS builder
 LABEL maintainer="Sebastian Hugentobler <sebastian@vanwa.ch>"
 
-ENV S6_OVERLAY_VERSION=v3.1.1.2
+ENV S6_OVERLAY_VERSION=v3.1.2.1
 
 RUN apk --no-cache add \
 	git \
@@ -14,10 +14,10 @@ RUN git clone https://github.com/just-containers/s6-overlay.git /src
 WORKDIR /src
 RUN git checkout "$S6_OVERLAY_VERSION"
 
-RUN make ARCH=x86_64-linux-musl
+RUN make ARCH=x86_64-linux-musl -j4
 
 
-FROM docker.io/alpine:3.16
+FROM docker.io/alpine:3.17
 
 ENV LANG=en_US.UTF-8
 ENV S6_KEEP_ENV=1
@@ -28,7 +28,10 @@ COPY --from=builder /src/output/rootfs-overlay-noarch /
 COPY --from=builder /src/output/rootfs-overlay-x86_64-linux-musl /
 
 RUN apk --no-cache add \
-    syslog-ng
+  syslog-ng \
+  tzdata
+
+ENV TZ=Europe/Zurich
 
 RUN apk --no-cache upgrade --ignore alpine-baselayout