diff --git a/Dockerfile b/Dockerfile
index e4e3bbf..c0d983f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -61,6 +61,7 @@ RUN apk update && apk add ca-certificates && rm -rf /var/cache/apk/*
 RUN update-ca-certificates
 RUN apk add --no-cache certbot certbot-nginx
 RUN apk update && apk add --no-cache dcron libcap
+RUN apk add --no-cache bash
 
 RUN chown nginx:nginx /usr/sbin/crond \
     && setcap cap_setgid=ep /usr/sbin/crond
diff --git a/README.md b/README.md
index fc6f142..ae6bc93 100644
--- a/README.md
+++ b/README.md
@@ -47,14 +47,16 @@ If you need to run this image on a different port for `HTTPS`, Eg: change to `44
 ### Setup Free LetsEncrypt SSL with Automatic Certificate Renewal
 ***Requirements***
 - PUBLIC IPV4 and/or IPV6 address.
-- A domain name that resolves to speed test server's IP address.
+- A domain name/s that resolves to speed test server's IP address/es.
 - Email ID
 
-The following command will generate a Let's Encrypt certificate for your domain name and configure a cron job to automatically renew the certificate.
+The following command will generate a Let's Encrypt certificate for your domain name/s and configure a cron job to automatically renew the certificate. 
 
 ````
 docker run -e ENABLE_LETSENCRYPT=True -e DOMAIN_NAME=speedtest.yourdomain.com -e USER_EMAIL=you@yourdomain.pro --restart=unless-stopped --name openspeedtest -d -p 80:3000 -p 443:3001 openspeedtest/latest
 ````
+DOMAIN_NAME may be a single value, Eg: 'speedtest.yourdomain.com' or a comma separated list, Eg: 'speedtest.yourdomain.com,ipv4.speedtest.yourdomain.com,ipv6.speedtest.yourdomain.com'
+
 #### Or use docker-compose.yml 
 ````
 version: '3.3'
diff --git a/files/entrypoint.sh b/files/entrypoint.sh
index 6c5abdb..31a1b37 100644
--- a/files/entrypoint.sh
+++ b/files/entrypoint.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 ip a | egrep -q 'inet6 '
 if [[ $? -ne 0 ]]; then
@@ -116,24 +116,24 @@ fi
 
 fi
 
-
-if [ "$DOMAIN_NAME" ]; then
-sed -i "/\bYOURDOMAIN\b/c\ server_name _ localhost ${DOMAIN_NAME};" "${CONFIG}"
+DOMAIN_ARRAY=()
+if [ "$DOMAIN_NAME" != false ]; then
+  IFS=',' read -a DOMAIN_ARRAY <<< "$DOMAIN_NAME"
+  echo "Configuring domain name/s - ${DOMAIN_ARRAY[*]}"
+  sed -i "/\bYOURDOMAIN\b/c\ server_name _ localhost ${DOMAIN_ARRAY[*]};" "${CONFIG}"
 fi
 
 nginx -g 'daemon off;' & sleep 5
 
 if [ "$ENABLE_LETSENCRYPT" = True ] && [ "$DOMAIN_NAME" ] && [ "$USER_EMAIL" ]; then
-
-fullchain_path="/var/log/letsencrypt/live/${DOMAIN_NAME}/fullchain.pem"
-
-certbot certonly -n --webroot --webroot-path /usr/share/nginx/html --no-redirect --agree-tos --email "$USER_EMAIL" -d "$DOMAIN_NAME" --config-dir /var/log/letsencrypt/ --work-dir /var/log/letsencrypt/work --logs-dir /var/log/letsencrypt/log 
+  fullchain_path="/var/log/letsencrypt/live/${DOMAIN_ARRAY[0]}/fullchain.pem"
+  certbot certonly -n --webroot --webroot-path /usr/share/nginx/html --no-redirect --agree-tos --email "$USER_EMAIL" --expand ${DOMAIN_ARRAY[@]/#/ -d } --config-dir /var/log/letsencrypt/ --work-dir /var/log/letsencrypt/work --logs-dir /var/log/letsencrypt/log 
 
   if [ $? -eq 0 ]; then
 
       if [ -f "$fullchain_path" ]; then
-      sed -i "/\bssl_certificate\b/c\ssl_certificate \/var\/log\/letsencrypt\/live\/${DOMAIN_NAME}\/fullchain.pem;" "${CONFIG}"
-      sed -i "/\bssl_certificate_key\b/c\ssl_certificate_key \/var\/log\/letsencrypt\/live\/${DOMAIN_NAME}\/privkey.pem;" "${CONFIG}"
+      sed -i "/\bssl_certificate\b/c\ssl_certificate \/var\/log\/letsencrypt\/live\/${DOMAIN_ARRAY[0]}\/fullchain.pem;" "${CONFIG}"
+      sed -i "/\bssl_certificate_key\b/c\ssl_certificate_key \/var\/log\/letsencrypt\/live\/${DOMAIN_ARRAY[0]}\/privkey.pem;" "${CONFIG}"
       nginx -s reload
       echo "Let's Encrypt certificate obtained successfully."
       random_minute=$(shuf -i 0-59 -n 1)
diff --git a/files/renew.sh b/files/renew.sh
index be4b095..3d6e1c0 100644
--- a/files/renew.sh
+++ b/files/renew.sh
@@ -1,11 +1,12 @@
-#!/bin/sh
+#!/bin/bash
 
-
-fullchain_path="/var/log/letsencrypt/live/${DOMAIN_NAME}/fullchain.pem"
+DOMAIN_ARRAY=()
+IFS=',' read -a DOMAIN_ARRAY <<< "$DOMAIN_NAME"
+fullchain_path="/var/log/letsencrypt/live/${DOMAIN_ARRAY[0]}/fullchain.pem"
 
 if [ "$ENABLE_LETSENCRYPT" = True ] && [ "$DOMAIN_NAME" ] && [ "$USER_EMAIL" ]; then
 
-certbot certonly -n --webroot --webroot-path /usr/share/nginx/html --no-redirect --agree-tos --email "$USER_EMAIL" -d "$DOMAIN_NAME" --config-dir /var/log/letsencrypt/ --work-dir /var/log/letsencrypt/work --logs-dir /var/log/letsencrypt/log
+certbot certonly -n --webroot --webroot-path /usr/share/nginx/html --no-redirect --agree-tos --email "$USER_EMAIL" --expand ${DOMAIN_ARRAY[@]/#/ -d } --config-dir /var/log/letsencrypt/ --work-dir /var/log/letsencrypt/work --logs-dir /var/log/letsencrypt/log
     if [ $? -eq 0 ]; then
         echo "certbot certonly -n... Executed."
         if [ -f "$fullchain_path" ]; then