diff --git a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/ACMECertificateDomain.inc b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/ACMECertificateDomain.inc
index 4604efb7..95d7638f 100644
--- a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/ACMECertificateDomain.inc
+++ b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/ACMECertificateDomain.inc
@@ -305,6 +305,8 @@ class ACMECertificateDomain extends Model {
     public StringField $zone_username;
     public StringField $zone_key;
     public StringField $zilore_key;
+    public StringField $technitium_server;
+    public StringField $technitium_token;
     public StringField $anydnschallengealias;
     public BooleanField $anydnschallengedomain;
 
@@ -2524,6 +2526,21 @@ class ACMECertificateDomain extends Model {
             conditions: ['method' => 'dns_zilore'],
             help_text: 'Zilore API Key',
         );
+        $this->technitium_server = new StringField(
+            default: '',
+            allow_empty: true,
+            internal_name: 'dns_technitiumtechnitium_server',
+            conditions: ['method' => 'dns_technitium'],
+            help_text: 'Technitium DNS Server address',
+        );
+        $this->technitium_token = new StringField(
+            default: '',
+            allow_empty: true,
+            sensitive: true,
+            internal_name: 'dns_technitiumtechnitium_token',
+            conditions: ['method' => 'dns_technitium'],
+            help_text: 'Technitium DNS Server API Token',
+        );
         $this->anydnschallengealias = new StringField(
             default: '',
             allow_empty: true,
diff --git a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateAuthority.inc b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateAuthority.inc
index bfe4645a..0f121969 100644
--- a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateAuthority.inc
+++ b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateAuthority.inc
@@ -8,6 +8,7 @@ use RESTAPI\Fields\BooleanField;
 use RESTAPI\Fields\IntegerField;
 use RESTAPI\Fields\StringField;
 use RESTAPI\Fields\UIDField;
+use RESTAPI\Responses\ConflictError;
 use RESTAPI\Responses\ForbiddenError;
 use RESTAPI\Responses\ValidationError;
 use RESTAPI\Validators\RegexValidator;
@@ -115,8 +116,8 @@ class CertificateAuthority extends Model {
      */
     public function _delete(): void {
         # Do not allow this CertificateAuthority to be deleted if it is in use
-        if (cert_in_use($this->refid->value)) {
-            throw new ForbiddenError(
+        if (ca_in_use($this->refid->value)) {
+            throw new ConflictError(
                 message: 'Certificate authority cannot be deleted because it is in use.',
                 response_id: 'CERTIFICATE_AUTHORITY_CANNOT_BE_DELETED_WHILE_IN_USE',
             );
diff --git a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateRevocationList.inc b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateRevocationList.inc
index 031bf96a..7f8ca96a 100644
--- a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateRevocationList.inc
+++ b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/CertificateRevocationList.inc
@@ -40,7 +40,6 @@ class CertificateRevocationList extends Model {
         $this->descr = new StringField(
             required: true,
             unique: true,
-            editable: false,
             validators: [new RegexValidator(pattern: "/[\?\>\<\&\/\\\"\']/", invert: true)],
             help_text: 'The unique name/description for this CRL.',
         );
@@ -59,7 +58,6 @@ class CertificateRevocationList extends Model {
         );
         $this->lifetime = new IntegerField(
             default: 730,
-            editable: false,
             minimum: 1,
             maximum: 8381,
             conditions: ['method' => 'internal'],
@@ -67,7 +65,6 @@ class CertificateRevocationList extends Model {
         );
         $this->serial = new IntegerField(
             default: 0,
-            editable: false,
             conditions: ['method' => 'internal'],
             help_text: 'The serial number of the CRL.',
         );
diff --git a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Tests/APIModelsCertificateAuthorityTestCase.inc b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Tests/APIModelsCertificateAuthorityTestCase.inc
index d07f8a77..c0436596 100644
--- a/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Tests/APIModelsCertificateAuthorityTestCase.inc
+++ b/pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Tests/APIModelsCertificateAuthorityTestCase.inc
@@ -3,6 +3,7 @@
 namespace RESTAPI\Tests;
 
 use RESTAPI\Core\Command;
+use RESTAPI\Core\Model;
 use RESTAPI\Core\TestCase;
 use RESTAPI\Models\CertificateAuthority;
 
@@ -127,6 +128,25 @@ R02Pul8ulWQ8Kl3Q3pou8As7W1mMzA2DxQ==
         $ca->delete();
     }
 
-    # TODO: Need test to ensure CA cannot be deleted while in use
+    /**
+     * Checks that we cannot delete a CA that is in use.
+     */
+    public function test_cannot_delete_ca_in_use(): void {
+        # Create a CA to test with
+        $ca = new CertificateAuthority(descr: 'test', crt: self::EXAMPLE_CRT, prv: self::EXAMPLE_PRV);
+        $ca->create();
+
+        # Mock an OpenVPN server using this CA to be in use
+        Model::set_config(path: 'openvpn/openvpn-server/0/caref', value: $ca->refid->value);
+
+        # Ensure an error is thrown if we try to delete the CA while it's in use
+        $this->assert_throws_response(
+            response_id: 'CERTIFICATE_AUTHORITY_CANNOT_BE_DELETED_WHILE_IN_USE',
+            code: 409,
+            callable: function () use ($ca) {
+                $ca->delete();
+            },
+        );
+    }
     # TODO: Need test to ensure crt must be CA capable
 }