diff --git a/readme-vars.yml b/readme-vars.yml
index 27bde094..4713fc9f 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -32,6 +32,7 @@ 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` 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: "CERT_PROFILE", env_value: "", desc: "Optionally define a cert profile to use for cert generation. This is useful if you want to use a custom cert profile instead of the default one. Currently only supported for Let's Encrypt. See https://letsencrypt.org/docs/profiles/ "}  
   - {env_var: "DNSPLUGIN", env_value: "cloudflare", desc: "Required if `VALIDATION` is set to `dns`. Options are `acmedns`, `aliyun`, `azure`, `bunny`, `cloudflare`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `dnspod`, `do`, `domeneshop`, `dreamhost`, `duckdns`, `dynu`, `freedns`, `gandi`, `gehirn`, `glesys`, `godaddy`, `google`, `he`, `hetzner`, `hetzner-cloud`, `infomaniak`, `inwx`, `ionos`, `linode`, `loopia`, `luadns`, `namecheap`, `netcup`, `njalla`, `nsone`, `ovh`, `porkbun`, `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: "EMAIL", env_value: "", desc: "Optional e-mail address used for cert expiration notifications (Required for ZeroSSL)."}
@@ -219,6 +220,7 @@ init_diagram: |
   "swag:latest" <- Base Images
 # changelog
 changelogs:
+  - {date: "05.05.26:", desc: "Added support for Let's Encrypt cert profiles." }
   - {date: "23.01.26:", desc: "Reorder init to fix proxy conf version checks."}
   - {date: "21.12.25:", desc: "Add support for hetzner-cloud dns validation."}
   - {date: "04.11.25:", desc: "Switch default Gandi credentials from API Key to Token, allow DNS propagation time for Azure DNS plugin."}
diff --git a/root/etc/s6-overlay/s6-rc.d/init-certbot-config/run b/root/etc/s6-overlay/s6-rc.d/init-certbot-config/run
index 5e34aaae..dd24ba1d 100755
--- a/root/etc/s6-overlay/s6-rc.d/init-certbot-config/run
+++ b/root/etc/s6-overlay/s6-rc.d/init-certbot-config/run
@@ -12,12 +12,13 @@ EXTRA_DOMAINS=${EXTRA_DOMAINS}\\n\
 ONLY_SUBDOMAINS=${ONLY_SUBDOMAINS}\\n\
 VALIDATION=${VALIDATION}\\n\
 CERTPROVIDER=${CERTPROVIDER}\\n\
+CERT_PROFILE=${CERT_PROFILE}\\n\
 DNSPLUGIN=${DNSPLUGIN}\\n\
 EMAIL=${EMAIL}\\n\
 STAGING=${STAGING}\\n"
 
 # Sanitize variables
-SANED_VARS=(DNSPLUGIN EMAIL EXTRA_DOMAINS ONLY_SUBDOMAINS STAGING SUBDOMAINS URL VALIDATION CERTPROVIDER)
+SANED_VARS=(DNSPLUGIN EMAIL EXTRA_DOMAINS ONLY_SUBDOMAINS STAGING SUBDOMAINS URL VALIDATION CERTPROVIDER CERT_PROFILE)
 for i in "${SANED_VARS[@]}"; do
     export echo "${i}"="${!i//\"/}"
     export echo "${i}"="$(echo "${!i}" | tr '[:upper:]' '[:lower:]')"
@@ -80,7 +81,7 @@ if [[ -f "/config/donoteditthisfile.conf" ]]; then
     mv /config/donoteditthisfile.conf /config/.donoteditthisfile.conf
 fi
 if [[ ! -f "/config/.donoteditthisfile.conf" ]]; then
-    echo -e "ORIGURL=\"${URL}\" ORIGSUBDOMAINS=\"${SUBDOMAINS}\" ORIGONLY_SUBDOMAINS=\"${ONLY_SUBDOMAINS}\" ORIGEXTRA_DOMAINS=\"${EXTRA_DOMAINS}\" ORIGVALIDATION=\"${VALIDATION}\" ORIGDNSPLUGIN=\"${DNSPLUGIN}\" ORIGPROPAGATION=\"${PROPAGATION}\" ORIGSTAGING=\"${STAGING}\" ORIGCERTPROVIDER=\"${CERTPROVIDER}\" ORIGEMAIL=\"${EMAIL}\"" >/config/.donoteditthisfile.conf
+    echo -e "ORIGURL=\"${URL}\" ORIGSUBDOMAINS=\"${SUBDOMAINS}\" ORIGONLY_SUBDOMAINS=\"${ONLY_SUBDOMAINS}\" ORIGEXTRA_DOMAINS=\"${EXTRA_DOMAINS}\" ORIGVALIDATION=\"${VALIDATION}\" ORIGDNSPLUGIN=\"${DNSPLUGIN}\" ORIGPROPAGATION=\"${PROPAGATION}\" ORIGSTAGING=\"${STAGING}\" ORIGCERTPROVIDER=\"${CERTPROVIDER}\" ORIGEMAIL=\"${EMAIL}\" ORIGCERT_PROFILE=\"${CERT_PROFILE}\"" >/config/.donoteditthisfile.conf
     echo "Created .donoteditthisfile.conf"
 fi
 
@@ -186,7 +187,8 @@ if [[ ! "${URL}" = "${ORIGURL}" ]] ||
     [[ ! "${DNSPLUGIN}" = "${ORIGDNSPLUGIN}" ]] ||
     [[ ! "${PROPAGATION}" = "${ORIGPROPAGATION}" ]] ||
     [[ ! "${STAGING}" = "${ORIGSTAGING}" ]] ||
-    [[ ! "${CERTPROVIDER}" = "${ORIGCERTPROVIDER}" ]]; then
+    [[ ! "${CERTPROVIDER}" = "${ORIGCERTPROVIDER}" ]] ||
+    [[ ! "${CERT_PROFILE}" = "${ORIGCERT_PROFILE}" ]]; then
     echo "Different validation parameters entered than what was used before. Revoking and deleting existing certificate, and an updated one will be created"
     if [[ "${ORIGCERTPROVIDER}" = "zerossl" ]]; then
         REV_ACMESERVER=("https://acme.zerossl.com/v2/DV90")
@@ -204,11 +206,14 @@ if [[ ! "${URL}" = "${ORIGURL}" ]] ||
 fi
 
 # saving new variables
-echo -e "ORIGURL=\"${URL}\" ORIGSUBDOMAINS=\"${SUBDOMAINS}\" ORIGONLY_SUBDOMAINS=\"${ONLY_SUBDOMAINS}\" ORIGEXTRA_DOMAINS=\"${EXTRA_DOMAINS}\" ORIGVALIDATION=\"${VALIDATION}\" ORIGDNSPLUGIN=\"${DNSPLUGIN}\" ORIGPROPAGATION=\"${PROPAGATION}\" ORIGSTAGING=\"${STAGING}\" ORIGCERTPROVIDER=\"${CERTPROVIDER}\" ORIGEMAIL=\"${EMAIL}\"" >/config/.donoteditthisfile.conf
-
-# Check if the cert is using the old LE root cert, revoke and regen if necessary
-if [[ -f "/config/keys/letsencrypt/chain.pem" ]] && { [[ "${CERTPROVIDER}" == "letsencrypt" ]] || [[ "${CERTPROVIDER}" == "" ]]; } && [[ "${STAGING}" != "true" ]] && ! openssl x509 -in /config/keys/letsencrypt/chain.pem -noout -issuer | grep -q "ISRG Root X"; then
-    echo "The cert seems to be using the old LE root cert, which is no longer valid. Deleting and revoking."
+echo -e "ORIGURL=\"${URL}\" ORIGSUBDOMAINS=\"${SUBDOMAINS}\" ORIGONLY_SUBDOMAINS=\"${ONLY_SUBDOMAINS}\" ORIGEXTRA_DOMAINS=\"${EXTRA_DOMAINS}\" ORIGVALIDATION=\"${VALIDATION}\" ORIGDNSPLUGIN=\"${DNSPLUGIN}\" ORIGPROPAGATION=\"${PROPAGATION}\" ORIGSTAGING=\"${STAGING}\" ORIGCERTPROVIDER=\"${CERTPROVIDER}\" ORIGEMAIL=\"${EMAIL}\" ORIGCERT_PROFILE=\"${CERT_PROFILE}\"" >/config/.donoteditthisfile.conf
+
+# Check if the cert is chained through the expired DST Root CA X3, revoke and regen if necessary
+if [[ -f "/config/keys/letsencrypt/chain.pem" ]] && \
+   { [[ "${CERTPROVIDER}" == "letsencrypt" ]] || [[ "${CERTPROVIDER}" == "" ]]; } && \
+   [[ "${STAGING}" != "true" ]] && \
+   openssl x509 -in /config/keys/letsencrypt/chain.pem -noout -issuer | grep -q "DST Root CA X3"; then
+    echo "The cert is chained through the expired DST Root CA X3. Deleting and revoking to force re-issuance."
     REV_ACMESERVER=("https://acme-v02.api.letsencrypt.org/directory")
     if [[ -f /config/etc/letsencrypt/live/"${ORIGDOMAIN}"/fullchain.pem ]]; then
         certbot revoke --config-dir /config/etc/letsencrypt --logs-dir /config/log/letsencrypt --work-dir /tmp/letsencrypt --config /config/etc/letsencrypt/cli.ini --non-interactive --cert-path /config/etc/letsencrypt/live/"${ORIGDOMAIN}"/fullchain.pem --server "${REV_ACMESERVER[@]}" || true
@@ -239,6 +244,21 @@ fi
 
 set_ini_value "server" "${ACMESERVER}" /config/etc/letsencrypt/cli.ini
 
+# set certificate profile (e.g. "shortlived" for 6-day certs, "classic" for 90-day)
+# Profiles are a Let's Encrypt ACME feature; ZeroSSL ignores it.
+if [[ -n "${CERT_PROFILE}" ]]; then
+    if [[ "${CERTPROVIDER}" = "zerossl" ]]; then
+        echo "ZeroSSL does not support ACME profiles, ignoring CERT_PROFILE variable"
+        sed -i "/^preferred-profile\b/d" /config/etc/letsencrypt/cli.ini
+    else
+        echo "Requesting certificate with profile: ${CERT_PROFILE}"
+        set_ini_value "preferred-profile" "${CERT_PROFILE}" /config/etc/letsencrypt/cli.ini
+    fi
+else
+    # remove if previously set so going back to default works
+    sed -i "/^preferred-profile\b/d" /config/etc/letsencrypt/cli.ini
+fi
+
 # figuring out domain only vs domain & subdomains vs subdomains only
 DOMAINS_ARRAY=()
 if [[ -z "${SUBDOMAINS}" ]] || [[ "${ONLY_SUBDOMAINS}" != true ]]; then