diff --git a/Dockerfile b/Dockerfile
index 3033155..ed209bb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,8 @@ RUN apk --no-cache add libressl syslog-ng incron && \
     wget -qO- https://github.com/just-containers/s6-overlay/releases/download/$S6_OVERLAY_VERSION/s6-overlay-amd64.tar.gz | tar -xz -C / && \
     apk del libressl
 
+RUN apk --no-cache upgrade
+
 ADD /rootfs /
 
 ENTRYPOINT ["/init"]