diff --git a/src/Api/AcmeApi.php b/src/Api/AcmeApi.php
index d579779..45e20b8 100644
--- a/src/Api/AcmeApi.php
+++ b/src/Api/AcmeApi.php
@@ -43,7 +43,6 @@ public function create(
         ?string $postalCode = null,
         ?string $city = null,
         ?bool $autoRenew = null,
-        ?int $certValidity = null,
         ?Approver $approver = null,
         bool $isQuote = false
     ): AcmeSubscriptionResponse | DomainQuote {
@@ -59,7 +58,6 @@ public function create(
             'city' => $city,
             'autoRenew' => $autoRenew,
             'period' => $period,
-            'certValidity' => $certValidity,
             'approver' => $approver?->toArray(),
         ], fn ($value) => ! is_null($value));
 
diff --git a/src/Domain/AcmeSubscription.php b/src/Domain/AcmeSubscription.php
index 75ab160..1d4101a 100644
--- a/src/Domain/AcmeSubscription.php
+++ b/src/Domain/AcmeSubscription.php
@@ -24,7 +24,6 @@ private function __construct(
         public int $period,
         public string $directoryUrl,
         public bool $autoRenew,
-        public ?int $certValidity,
         public ?DateTime $orgValidUntil,
         public ?string $organizationId,
         public string $status
@@ -56,7 +55,6 @@ public static function fromArray(array $json): AcmeSubscription
             $json['period'],
             $json['directoryUrl'],
             $json['autoRenew'] ?? null,
-            $json['certValidity'] ?? null,
             isset($json['orgValidUntil']) ? new DateTime($json['orgValidUntil']) : null,
             $json['organizationId'] ?? null,
             $json['status']
@@ -82,7 +80,6 @@ public function toArray(): array
             'period' => $this->period,
             'directoryUrl' => $this->directoryUrl,
             'autoRenew' => $this->autoRenew,
-            'certValidity' => $this->certValidity,
             'orgValidUntil' => $this->orgValidUntil?->format('Y-m-d\TH:i:s\Z'),
             'organizationId' => $this->organizationId,
             'status' => $this->status,
diff --git a/tests/Clients/Acme/AcmeApiCreateTest.php b/tests/Clients/Acme/AcmeApiCreateTest.php
index 0bac07b..7a0447e 100644
--- a/tests/Clients/Acme/AcmeApiCreateTest.php
+++ b/tests/Clients/Acme/AcmeApiCreateTest.php
@@ -43,7 +43,6 @@ static function () use ($response): Response {
             '1234AB',
             'City',
             true,
-            199,
             Approver::fromArray(
                 ['firstName' => 'First Name',
                     'lastName' => 'Last Name',