diff --git a/Dockerfile b/Dockerfile
index fc05fb0..c17c0e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ RUN \
     /root-out/var/log/*
 
 # set version for s6 overlay
-ARG S6_OVERLAY_VERSION="3.1.5.0"
+ARG S6_OVERLAY_VERSION="3.1.6.2"
 ARG S6_OVERLAY_ARCH="x86_64"
 
 # add s6 overlay
@@ -101,6 +101,7 @@ RUN \
     > /run/systemd/container && \
   echo "**** install apt-utils and locales ****" && \
   apt-get update && \
+  apt-get upgrade && \
   apt-get install -y \
     apt-utils \
     locales && \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 645b8d4..ee19e0b 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -27,7 +27,7 @@ RUN \
     /root-out/var/log/*
 
 # set version for s6 overlay
-ARG S6_OVERLAY_VERSION="3.1.5.0"
+ARG S6_OVERLAY_VERSION="3.1.6.2"
 ARG S6_OVERLAY_ARCH="aarch64"
 
 # add s6 overlay
@@ -101,6 +101,7 @@ RUN \
     > /run/systemd/container && \
   echo "**** install apt-utils and locales ****" && \
   apt-get update && \
+  apt-get upgrade && \
   apt-get install -y \
     apt-utils \
     locales && \