diff --git a/Dockerfile b/Dockerfile
index 33fc1e3..95086d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,40 +1,40 @@
-ARG alpine_version=3.13.3
+ARG alpine_version=3.13.4
 
 FROM alpine:${alpine_version} as base
 RUN apk update && apk upgrade
 
 RUN apk add --no-cache \
     ca-certificates \
     py3-paramiko \
     py3-pip \
     py3-prometheus-client \
     py3-requests \
     py3-werkzeug \
     py3-wheel \
     py3-yaml \
     python3 \
     tini
 
 FROM base as builder
 
 ARG proxmoxer_version=1.1.1
 ENV proxmoxer_version=${proxmoxer_version}
 
 ADD . /src
 WORKDIR /opt
 RUN pip3 wheel --no-deps /src proxmoxer==${proxmoxer_version}
 
 FROM base as runtime
 
 COPY --from=builder /opt /opt
 
 RUN pip3 install --no-cache-dir --no-index /opt/*py3-none-any.whl && \
     rm /opt/*py3-none-any.whl
 
 USER nobody
 
 EXPOSE 9221
 
 ENTRYPOINT [ "/sbin/tini", "--", "/usr/bin/pve_exporter" ]
 
 CMD [ "/etc/pve.yml" ]