diff --git a/Dockerfile b/Dockerfile
index 6fd2a49..443d0e9 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -112,6 +112,7 @@ RUN \
     certbot-dns-dnsmadeeasy \
     certbot-dns-dnspod \
     certbot-dns-domeneshop \
+    certbot-dns-dynu \
     certbot-dns-google \
     certbot-dns-he \
     certbot-dns-hetzner \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index e9d1c9e..24f4c63 100755
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -112,6 +112,7 @@ RUN \
     certbot-dns-dnsmadeeasy \
     certbot-dns-dnspod \
     certbot-dns-domeneshop \
+    certbot-dns-dynu \
     certbot-dns-google \
     certbot-dns-he \
     certbot-dns-hetzner \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 8a448f2..53aca75 100755
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -112,6 +112,7 @@ RUN \
     certbot-dns-dnsmadeeasy \
     certbot-dns-dnspod \
     certbot-dns-domeneshop \
+    certbot-dns-dynu \
     certbot-dns-google \
     certbot-dns-he \
     certbot-dns-hetzner \
diff --git a/readme-vars.yml b/readme-vars.yml
index d6a958c..b492d49 100755
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -51,7 +51,7 @@ opt_param_usage_include_env: true
 opt_param_env_vars:
   - { env_var: "SUBDOMAINS", env_value: "www,", desc: "Subdomains you'd like the cert to cover (comma separated, no spaces) ie. `www,ftp,cloud`. For a wildcard cert, set this _exactly_ to `wildcard` (wildcard cert is available via `dns` and `duckdns` validation only)" }
   - { env_var: "CERTPROVIDER", env_value: "", desc: "Optionally define the cert provider. Set to `zerossl` for ZeroSSL certs (requires existing [ZeroSSL account](https://app.zerossl.com/signup) and the e-mail address entered in `EMAIL` env var). Otherwise defaults to Let's Encrypt." }
-  - { env_var: "DNSPLUGIN", env_value: "cloudflare", desc: "Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `azure`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `dnspod`, `domeneshop`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `infomaniak`, `inwx`, `ionos`, `linode`, `loopia`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `standalone`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`." }
+  - { env_var: "DNSPLUGIN", env_value: "cloudflare", desc: "Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `azure`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `dnspod`, `domeneshop`, `dynu`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `infomaniak`, `inwx`, `ionos`, `linode`, `loopia`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `standalone`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`." }
   - { env_var: "PROPAGATION", env_value: "", desc: "Optionally override (in seconds) the default propagation time for the dns plugins." }
   - { env_var: "DUCKDNSTOKEN", env_value: "", desc: "Required if `VALIDATION` is set to `duckdns`. Retrieve your token from https://www.duckdns.org" }
   - { env_var: "EMAIL", env_value: "", desc: "Optional e-mail address used for cert expiration notifications (Required for ZeroSSL)." }
@@ -155,6 +155,7 @@ app_setup_nginx_reverse_proxy_block: ""
 
 # changelog
 changelogs:
+  - { date: "10.08.22:", desc: "Added support for Dynu DNS validation." }
   - { date: "18.05.22:", desc: "Added support for Azure DNS validation." }
   - { date: "09.04.22:", desc: "Added certbot-dns-loopia for DNS01 validation." }
   - { date: "05.04.22:", desc: "Added support for standalone DNS validation." }
diff --git a/root/defaults/dns-conf/dynu.ini b/root/defaults/dns-conf/dynu.ini
new file mode 100644
index 0000000..9bcd4b8
--- /dev/null
+++ b/root/defaults/dns-conf/dynu.ini
@@ -0,0 +1,3 @@
+# Instructions: https://github.com/bikram990/certbot-dns-dynu#configuration
+# Replace with your API token from your dynu account.
+dns_dynu_auth_token = AbCbASsd!@34
\ No newline at end of file
diff --git a/root/etc/cont-init.d/50-config b/root/etc/cont-init.d/50-config
index 21cc80d..132b3d9 100644
--- a/root/etc/cont-init.d/50-config
+++ b/root/etc/cont-init.d/50-config
@@ -120,7 +120,7 @@ if ! grep -q 'PARAMETERS' "/config/nginx/dhparams.pem"; then
 fi
 
 # check to make sure DNSPLUGIN is selected if dns validation is used
-[[ "$VALIDATION" = "dns" ]] && [[ ! "$DNSPLUGIN" =~ ^(aliyun|azure|cloudflare|cloudxns|cpanel|desec|digitalocean|directadmin|dnsimple|dnsmadeeasy|dnspod|domeneshop|gandi|gehirn|google|he|hetzner|infomaniak|inwx|ionos|linode|loopia|luadns|netcup|njalla|nsone|ovh|rfc2136|route53|sakuracloud|standalone|transip|vultr)$ ]] && \
+[[ "$VALIDATION" = "dns" ]] && [[ ! "$DNSPLUGIN" =~ ^(aliyun|azure|cloudflare|cloudxns|cpanel|desec|digitalocean|directadmin|dnsimple|dnsmadeeasy|dnspod|domeneshop|dynu|gandi|gehirn|google|he|hetzner|infomaniak|inwx|ionos|linode|loopia|luadns|netcup|njalla|nsone|ovh|rfc2136|route53|sakuracloud|standalone|transip|vultr)$ ]] && \
     echo "Please set the DNSPLUGIN variable to a valid plugin name. See docker info for more details." && \
     sleep infinity
 
@@ -234,7 +234,7 @@ if [ "$VALIDATION" = "dns" ]; then
     elif [[ "$DNSPLUGIN" =~ ^(google)$ ]]; then
         if [ -n "$PROPAGATION" ];then PROPAGATIONPARAM="--dns-${DNSPLUGIN}-propagation-seconds ${PROPAGATION}"; fi
         PREFCHAL="--dns-${DNSPLUGIN} --dns-${DNSPLUGIN}-credentials /config/dns-conf/${DNSPLUGIN}.json ${PROPAGATIONPARAM}"
-    elif [[ "$DNSPLUGIN" =~ ^(aliyun|desec|dnspod|domeneshop|he|hetzner|infomaniak|inwx|ionos|loopia|netcup|njalla|transip|vultr)$ ]]; then
+    elif [[ "$DNSPLUGIN" =~ ^(aliyun|desec|dnspod|domeneshop|dynu|he|hetzner|infomaniak|inwx|ionos|loopia|netcup|njalla|transip|vultr)$ ]]; then
         if [ -n "$PROPAGATION" ];then PROPAGATIONPARAM="--dns-${DNSPLUGIN}-propagation-seconds ${PROPAGATION}"; fi
         PREFCHAL="-a dns-${DNSPLUGIN} --dns-${DNSPLUGIN}-credentials /config/dns-conf/${DNSPLUGIN}.ini ${PROPAGATIONPARAM}"
     elif [[ "$DNSPLUGIN" =~ ^(standalone)$ ]]; then