diff --git a/Dockerfile b/Dockerfile
index d2fa0e1..609208d 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -159,6 +159,8 @@ RUN \
   mkdir -p /defaults/fail2ban && \
   mv /etc/fail2ban/action.d /defaults/fail2ban/ && \
   mv /etc/fail2ban/filter.d /defaults/fail2ban/ && \
+  echo "**** define allowipv6 to silence warning ****" && \
+  sed -i 's/#allowipv6 = auto/allowipv6 = auto/g' /etc/fail2ban/fail2ban.conf && \
   echo "**** copy proxy confs to /defaults ****" && \
   mkdir -p \
     /defaults/nginx/proxy-confs && \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 0b11152..4546b5f 100755
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -159,6 +159,8 @@ RUN \
   mkdir -p /defaults/fail2ban && \
   mv /etc/fail2ban/action.d /defaults/fail2ban/ && \
   mv /etc/fail2ban/filter.d /defaults/fail2ban/ && \
+  echo "**** define allowipv6 to silence warning ****" && \
+  sed -i 's/#allowipv6 = auto/allowipv6 = auto/g' /etc/fail2ban/fail2ban.conf && \
   echo "**** copy proxy confs to /defaults ****" && \
   mkdir -p \
     /defaults/nginx/proxy-confs && \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 84c8e33..1efd3f5 100755
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -159,6 +159,8 @@ RUN \
   mkdir -p /defaults/fail2ban && \
   mv /etc/fail2ban/action.d /defaults/fail2ban/ && \
   mv /etc/fail2ban/filter.d /defaults/fail2ban/ && \
+  echo "**** define allowipv6 to silence warning ****" && \
+  sed -i 's/#allowipv6 = auto/allowipv6 = auto/g' /etc/fail2ban/fail2ban.conf && \
   echo "**** copy proxy confs to /defaults ****" && \
   mkdir -p \
     /defaults/nginx/proxy-confs && \