diff --git a/security/acme-client/pkg-descr b/security/acme-client/pkg-descr
index 1210efbde..49a81e7f0 100644
--- a/security/acme-client/pkg-descr
+++ b/security/acme-client/pkg-descr
@@ -10,6 +10,12 @@ Plugin Changelog
 
 4.16
 
+Added:
+* add support for Active24 API v2 (#5381)
+
+Changed:
+* credentials for Active24 DNSAPI must be entered again (#5381)
+
 Fixed:
 * fix incorrect naming scheme of TrueNAS WS automation
 
diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
index 851e12c85..6b3ce02aa 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
@@ -137,10 +137,15 @@
         <style>table_dns table_dns_active24</style>
     </field>
     <field>
-        <id>validation.dns_active24_token</id>
-        <label>Token</label>
+        <id>validation.dns_active24_api_key</id>
+        <label>API Key</label>
         <type>text</type>
     </field>
+    <field>
+        <id>validation.dns_active24_api_secret</id>
+        <label>API Secret</label>
+        <type>password</type>
+    </field>
     <field>
         <label>Alwaysdata</label>
         <type>header</type>
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsActive24.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsActive24.php
index 4b26d1bcf..79100ae6e 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsActive24.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsActive24.php
@@ -1,6 +1,7 @@
 <?php
 
 /*
+ * Copyright (C) 2026 Frank Wall
  * Copyright (C) 2022 Jan Winkler
  * All rights reserved.
  *
@@ -39,6 +40,7 @@ class DnsActive24 extends Base implements LeValidationInterface
 {
     public function prepare()
     {
-        $this->acme_env['ACTIVE24_Token'] = (string)$this->config->dns_active24_token;
+        $this->acme_env['Active24_ApiKey'] = (string)$this->config->dns_active24_api_key;
+        $this->acme_env['Active24_ApiSecret'] = (string)$this->config->dns_active24_api_secret;
     }
 }
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
index 40359e945..04b929616 100644
--- a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
@@ -552,9 +552,12 @@
                     <ValidationMessage>Please specify a value between 0 and 84600 seconds.</ValidationMessage>
                     <Required>Y</Required>
                 </dns_sleep>
-                <dns_active24_token type="TextField">
+                <dns_active24_api_key type="TextField">
                     <Required>N</Required>
-                </dns_active24_token>
+                </dns_active24_api_key>
+                <dns_active24_api_secret type="TextField">
+                    <Required>N</Required>
+                </dns_active24_api_secret>
                 <dns_ad_key type="TextField">
                     <Required>N</Required>
                 </dns_ad_key>