diff --git a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment.php b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment.php
index d0c9bb934e8..a32c7e61726 100644
--- a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment.php
+++ b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment.php
@@ -20,6 +20,8 @@
 class GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment extends \Google\Collection
 {
   protected $collection_key = 'labels';
+  protected $accountTakeoverVerdictType = GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict::class;
+  protected $accountTakeoverVerdictDataType = '';
   /**
    * Output only. Labels for this request.
    *
@@ -27,6 +29,22 @@ class GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessment extends \Google\
    */
   public $labels;
 
+  /**
+   * Output only. Account takeover risk assessment for this request.
+   *
+   * @param GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict $accountTakeoverVerdict
+   */
+  public function setAccountTakeoverVerdict(GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict $accountTakeoverVerdict)
+  {
+    $this->accountTakeoverVerdict = $accountTakeoverVerdict;
+  }
+  /**
+   * @return GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict
+   */
+  public function getAccountTakeoverVerdict()
+  {
+    return $this->accountTakeoverVerdict;
+  }
   /**
    * Output only. Labels for this request.
    *
diff --git a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason.php b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason.php
new file mode 100644
index 00000000000..288c6d1ed60
--- /dev/null
+++ b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason.php
@@ -0,0 +1,72 @@
+<?php
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+namespace Google\Service\RecaptchaEnterprise;
+
+class GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason extends \Google\Model
+{
+  /**
+   * Default unspecified type.
+   */
+  public const REASON_RISK_REASON_UNSPECIFIED = 'RISK_REASON_UNSPECIFIED';
+  /**
+   * The client has been observed sending bot-like traffic to this site in the
+   * past. This reason incorporates historical reputation and indicates that the
+   * client is known to use bots, even if the current request is being made by a
+   * human.
+   */
+  public const REASON_CLIENT_HISTORICAL_BOT_ACTIVITY = 'CLIENT_HISTORICAL_BOT_ACTIVITY';
+  /**
+   * The account is part of a large group of related accounts, indicating that
+   * it may be part of a fraudulent network. Related accounts are identified
+   * based on having similar traffic patterns and request characteristics.
+   */
+  public const REASON_ACCOUNT_IN_LARGE_RELATED_GROUP = 'ACCOUNT_IN_LARGE_RELATED_GROUP';
+  /**
+   * The client has been observed accessing many accounts on this site.
+   */
+  public const REASON_CLIENT_ACCESSED_MANY_ACCOUNTS = 'CLIENT_ACCESSED_MANY_ACCOUNTS';
+  /**
+   * Output only. A risk reason associated with this request.
+   *
+   * @var string
+   */
+  public $reason;
+
+  /**
+   * Output only. A risk reason associated with this request.
+   *
+   * Accepted values: RISK_REASON_UNSPECIFIED, CLIENT_HISTORICAL_BOT_ACTIVITY,
+   * ACCOUNT_IN_LARGE_RELATED_GROUP, CLIENT_ACCESSED_MANY_ACCOUNTS
+   *
+   * @param self::REASON_* $reason
+   */
+  public function setReason($reason)
+  {
+    $this->reason = $reason;
+  }
+  /**
+   * @return self::REASON_*
+   */
+  public function getReason()
+  {
+    return $this->reason;
+  }
+}
+
+// Adding a class alias for backwards compatibility with the previous class name.
+class_alias(GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason::class, 'Google_Service_RecaptchaEnterprise_GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason');
diff --git a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict.php b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict.php
new file mode 100644
index 00000000000..e3196adfdc5
--- /dev/null
+++ b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict.php
@@ -0,0 +1,91 @@
+<?php
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+namespace Google\Service\RecaptchaEnterprise;
+
+class GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict extends \Google\Collection
+{
+  protected $collection_key = 'trustReasons';
+  /**
+   * Output only. Account takeover attempt probability. Values are from 0.0
+   * (lowest risk) to 1.0 (highest risk).
+   *
+   * @var float
+   */
+  public $risk;
+  protected $riskReasonsType = GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason::class;
+  protected $riskReasonsDataType = 'array';
+  protected $trustReasonsType = GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason::class;
+  protected $trustReasonsDataType = 'array';
+
+  /**
+   * Output only. Account takeover attempt probability. Values are from 0.0
+   * (lowest risk) to 1.0 (highest risk).
+   *
+   * @param float $risk
+   */
+  public function setRisk($risk)
+  {
+    $this->risk = $risk;
+  }
+  /**
+   * @return float
+   */
+  public function getRisk()
+  {
+    return $this->risk;
+  }
+  /**
+   * Output only. Unordered list. Reasons why the request appears risky. Risk
+   * reasons can be returned even if the risk is low, as trustworthy requests
+   * can still have some risk signals.
+   *
+   * @param GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason[] $riskReasons
+   */
+  public function setRiskReasons($riskReasons)
+  {
+    $this->riskReasons = $riskReasons;
+  }
+  /**
+   * @return GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountRiskReason[]
+   */
+  public function getRiskReasons()
+  {
+    return $this->riskReasons;
+  }
+  /**
+   * Output only. Unordered list. Reasons why the request appears trustworthy.
+   * Trust reasons can be returned even if the risk is high, as risky requests
+   * can still have some trust signals.
+   *
+   * @param GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason[] $trustReasons
+   */
+  public function setTrustReasons($trustReasons)
+  {
+    $this->trustReasons = $trustReasons;
+  }
+  /**
+   * @return GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason[]
+   */
+  public function getTrustReasons()
+  {
+    return $this->trustReasons;
+  }
+}
+
+// Adding a class alias for backwards compatibility with the previous class name.
+class_alias(GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict::class, 'Google_Service_RecaptchaEnterprise_GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTakeoverVerdict');
diff --git a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason.php b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason.php
new file mode 100644
index 00000000000..0cf212ae255
--- /dev/null
+++ b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason.php
@@ -0,0 +1,65 @@
+<?php
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+namespace Google\Service\RecaptchaEnterprise;
+
+class GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason extends \Google\Model
+{
+  /**
+   * Default unspecified type.
+   */
+  public const REASON_TRUST_REASON_UNSPECIFIED = 'TRUST_REASON_UNSPECIFIED';
+  /**
+   * The request matches a trusted profile associated with this account.
+   * Equivalent to `AccountDefenderLabel.PROFILE_MATCH`.
+   */
+  public const REASON_PROFILE_MATCH = 'PROFILE_MATCH';
+  /**
+   * The account's historical activity is reputable. It is unlikely that the
+   * account has been compromised in the past.
+   */
+  public const REASON_ACCOUNT_HISTORY_REPUTABLE = 'ACCOUNT_HISTORY_REPUTABLE';
+  /**
+   * Output only. A trust reason associated with this request.
+   *
+   * @var string
+   */
+  public $reason;
+
+  /**
+   * Output only. A trust reason associated with this request.
+   *
+   * Accepted values: TRUST_REASON_UNSPECIFIED, PROFILE_MATCH,
+   * ACCOUNT_HISTORY_REPUTABLE
+   *
+   * @param self::REASON_* $reason
+   */
+  public function setReason($reason)
+  {
+    $this->reason = $reason;
+  }
+  /**
+   * @return self::REASON_*
+   */
+  public function getReason()
+  {
+    return $this->reason;
+  }
+}
+
+// Adding a class alias for backwards compatibility with the previous class name.
+class_alias(GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason::class, 'Google_Service_RecaptchaEnterprise_GoogleCloudRecaptchaenterpriseV1AccountDefenderAssessmentAccountTrustReason');
diff --git a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1RiskAnalysis.php b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1RiskAnalysis.php
index 904225c804e..3f00a4a9fae 100644
--- a/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1RiskAnalysis.php
+++ b/src/RecaptchaEnterprise/GoogleCloudRecaptchaenterpriseV1RiskAnalysis.php
@@ -44,8 +44,9 @@ class GoogleCloudRecaptchaenterpriseV1RiskAnalysis extends \Google\Collection
    */
   public $challenge;
   /**
-   * Output only. Extended verdict reasons to be used for experimentation only.
-   * The set of possible reasons is subject to change.
+   * Output only. Advanced reasons contributing to the risk analysis verdict.
+   * These reasons are available to Enterprise tier projects only. Contact sales
+   * for more information. The set of possible reasons is subject to change.
    *
    * @var string[]
    */
@@ -86,8 +87,9 @@ public function getChallenge()
     return $this->challenge;
   }
   /**
-   * Output only. Extended verdict reasons to be used for experimentation only.
-   * The set of possible reasons is subject to change.
+   * Output only. Advanced reasons contributing to the risk analysis verdict.
+   * These reasons are available to Enterprise tier projects only. Contact sales
+   * for more information. The set of possible reasons is subject to change.
    *
    * @param string[] $extendedVerdictReasons
    */