diff --git a/lib/Account.php b/lib/Account.php
index 22d9b90e3..57581f828 100644
--- a/lib/Account.php
+++ b/lib/Account.php
@@ -30,7 +30,7 @@
  */
 class Account extends ApiResource
 {
-    const OBJECT_NAME = "account";
+    const OBJECT_NAME = 'account';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/AccountLink.php b/lib/AccountLink.php
index 692447dbf..054ee260d 100644
--- a/lib/AccountLink.php
+++ b/lib/AccountLink.php
@@ -14,7 +14,7 @@
  */
 class AccountLink extends ApiResource
 {
-    const OBJECT_NAME = "account_link";
+    const OBJECT_NAME = 'account_link';
 
     use ApiOperations\Create;
 }
diff --git a/lib/AlipayAccount.php b/lib/AlipayAccount.php
index 1dcc09517..b95cb35f3 100644
--- a/lib/AlipayAccount.php
+++ b/lib/AlipayAccount.php
@@ -12,7 +12,7 @@
  */
 class AlipayAccount extends ApiResource
 {
-    const OBJECT_NAME = "alipay_account";
+    const OBJECT_NAME = 'alipay_account';
 
     use ApiOperations\Delete;
     use ApiOperations\Update;
diff --git a/lib/ApplePayDomain.php b/lib/ApplePayDomain.php
index 08fe6eb6a..9837f633c 100644
--- a/lib/ApplePayDomain.php
+++ b/lib/ApplePayDomain.php
@@ -15,7 +15,7 @@
  */
 class ApplePayDomain extends ApiResource
 {
-    const OBJECT_NAME = "apple_pay_domain";
+    const OBJECT_NAME = 'apple_pay_domain';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/ApplicationFee.php b/lib/ApplicationFee.php
index 2a8be248a..07f6f0acd 100644
--- a/lib/ApplicationFee.php
+++ b/lib/ApplicationFee.php
@@ -24,7 +24,7 @@
  */
 class ApplicationFee extends ApiResource
 {
-    const OBJECT_NAME = "application_fee";
+    const OBJECT_NAME = 'application_fee';
 
     use ApiOperations\All;
     use ApiOperations\NestedResource;
diff --git a/lib/ApplicationFeeRefund.php b/lib/ApplicationFeeRefund.php
index 77ba0ccd7..9b8c1b7fa 100644
--- a/lib/ApplicationFeeRefund.php
+++ b/lib/ApplicationFeeRefund.php
@@ -18,7 +18,7 @@
  */
 class ApplicationFeeRefund extends ApiResource
 {
-    const OBJECT_NAME = "fee_refund";
+    const OBJECT_NAME = 'fee_refund';
 
     use ApiOperations\Update {
         save as protected _save;
diff --git a/lib/Balance.php b/lib/Balance.php
index dfa1d3aa9..aacd60cbe 100644
--- a/lib/Balance.php
+++ b/lib/Balance.php
@@ -15,7 +15,7 @@
  */
 class Balance extends SingletonApiResource
 {
-    const OBJECT_NAME = "balance";
+    const OBJECT_NAME = 'balance';
 
     /**
      * @param array|string|null $opts
diff --git a/lib/BalanceTransaction.php b/lib/BalanceTransaction.php
index 13c23d2bc..44e1b9032 100644
--- a/lib/BalanceTransaction.php
+++ b/lib/BalanceTransaction.php
@@ -24,7 +24,7 @@
  */
 class BalanceTransaction extends ApiResource
 {
-    const OBJECT_NAME = "balance_transaction";
+    const OBJECT_NAME = 'balance_transaction';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/BankAccount.php b/lib/BankAccount.php
index 0a6581aa7..2f7bb5fb4 100644
--- a/lib/BankAccount.php
+++ b/lib/BankAccount.php
@@ -25,7 +25,7 @@
  */
 class BankAccount extends ApiResource
 {
-    const OBJECT_NAME = "bank_account";
+    const OBJECT_NAME = 'bank_account';
 
     use ApiOperations\Delete;
     use ApiOperations\Update;
diff --git a/lib/BitcoinReceiver.php b/lib/BitcoinReceiver.php
index 5bf4d738f..734476dae 100644
--- a/lib/BitcoinReceiver.php
+++ b/lib/BitcoinReceiver.php
@@ -35,7 +35,7 @@
  */
 class BitcoinReceiver extends ApiResource
 {
-    const OBJECT_NAME = "bitcoin_receiver";
+    const OBJECT_NAME = 'bitcoin_receiver';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/BitcoinTransaction.php b/lib/BitcoinTransaction.php
index 122be4231..72aaeb372 100644
--- a/lib/BitcoinTransaction.php
+++ b/lib/BitcoinTransaction.php
@@ -9,5 +9,5 @@
  */
 class BitcoinTransaction extends ApiResource
 {
-    const OBJECT_NAME = "bitcoin_transaction";
+    const OBJECT_NAME = 'bitcoin_transaction';
 }
diff --git a/lib/Capability.php b/lib/Capability.php
index 86324ad58..85370cc0f 100644
--- a/lib/Capability.php
+++ b/lib/Capability.php
@@ -17,7 +17,7 @@
  */
 class Capability extends ApiResource
 {
-    const OBJECT_NAME = "capability";
+    const OBJECT_NAME = 'capability';
 
     use ApiOperations\Update;
 
diff --git a/lib/Card.php b/lib/Card.php
index f7dd9d519..c6c5d56c9 100644
--- a/lib/Card.php
+++ b/lib/Card.php
@@ -38,7 +38,7 @@
  */
 class Card extends ApiResource
 {
-    const OBJECT_NAME = "card";
+    const OBJECT_NAME = 'card';
 
     use ApiOperations\Delete;
     use ApiOperations\Update;
diff --git a/lib/Charge.php b/lib/Charge.php
index 18a27c949..dd210606a 100644
--- a/lib/Charge.php
+++ b/lib/Charge.php
@@ -54,7 +54,7 @@
  */
 class Charge extends ApiResource
 {
-    const OBJECT_NAME = "charge";
+    const OBJECT_NAME = 'charge';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Checkout/Session.php b/lib/Checkout/Session.php
index 1fd639ca4..e4ee896d8 100644
--- a/lib/Checkout/Session.php
+++ b/lib/Checkout/Session.php
@@ -25,7 +25,7 @@
  */
 class Session extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "checkout.session";
+    const OBJECT_NAME = 'checkout.session';
 
     use \Stripe\ApiOperations\Create;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/Collection.php b/lib/Collection.php
index 45ed45b4e..f1e9266b6 100644
--- a/lib/Collection.php
+++ b/lib/Collection.php
@@ -14,7 +14,7 @@
  */
 class Collection extends StripeObject implements \IteratorAggregate
 {
-    const OBJECT_NAME = "list";
+    const OBJECT_NAME = 'list';
 
     use ApiOperations\Request;
 
diff --git a/lib/CountrySpec.php b/lib/CountrySpec.php
index ef02c340b..3599c015b 100644
--- a/lib/CountrySpec.php
+++ b/lib/CountrySpec.php
@@ -18,7 +18,7 @@
  */
 class CountrySpec extends ApiResource
 {
-    const OBJECT_NAME = "country_spec";
+    const OBJECT_NAME = 'country_spec';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/Coupon.php b/lib/Coupon.php
index 82fe19de4..53300474b 100644
--- a/lib/Coupon.php
+++ b/lib/Coupon.php
@@ -25,7 +25,7 @@
  */
 class Coupon extends ApiResource
 {
-    const OBJECT_NAME = "coupon";
+    const OBJECT_NAME = 'coupon';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/CreditNote.php b/lib/CreditNote.php
index 4ff3841cf..93dc25a11 100644
--- a/lib/CreditNote.php
+++ b/lib/CreditNote.php
@@ -28,7 +28,7 @@
  */
 class CreditNote extends ApiResource
 {
-    const OBJECT_NAME = "credit_note";
+    const OBJECT_NAME = 'credit_note';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Customer.php b/lib/Customer.php
index a581fb67b..c1d7d92c6 100644
--- a/lib/Customer.php
+++ b/lib/Customer.php
@@ -33,7 +33,7 @@
  */
 class Customer extends ApiResource
 {
-    const OBJECT_NAME = "customer";
+    const OBJECT_NAME = 'customer';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/CustomerBalanceTransaction.php b/lib/CustomerBalanceTransaction.php
index 357b0b83c..ac2384f7a 100644
--- a/lib/CustomerBalanceTransaction.php
+++ b/lib/CustomerBalanceTransaction.php
@@ -23,7 +23,7 @@
  */
 class CustomerBalanceTransaction extends ApiResource
 {
-    const OBJECT_NAME = "customer_balance_transaction";
+    const OBJECT_NAME = 'customer_balance_transaction';
 
     /**
      * Possible string representations of a balance transaction's type.
diff --git a/lib/Discount.php b/lib/Discount.php
index 68bfc0fd7..6af84fec1 100644
--- a/lib/Discount.php
+++ b/lib/Discount.php
@@ -16,5 +16,5 @@
  */
 class Discount extends StripeObject
 {
-    const OBJECT_NAME = "discount";
+    const OBJECT_NAME = 'discount';
 }
diff --git a/lib/Dispute.php b/lib/Dispute.php
index eb8dd7dd0..f79f74b1e 100644
--- a/lib/Dispute.php
+++ b/lib/Dispute.php
@@ -25,7 +25,7 @@
  */
 class Dispute extends ApiResource
 {
-    const OBJECT_NAME = "dispute";
+    const OBJECT_NAME = 'dispute';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/EphemeralKey.php b/lib/EphemeralKey.php
index 63cb33460..4479ebe41 100644
--- a/lib/EphemeralKey.php
+++ b/lib/EphemeralKey.php
@@ -17,7 +17,7 @@
  */
 class EphemeralKey extends ApiResource
 {
-    const OBJECT_NAME = "ephemeral_key";
+    const OBJECT_NAME = 'ephemeral_key';
 
     use ApiOperations\Create {
         create as protected _create;
diff --git a/lib/Event.php b/lib/Event.php
index 26a301fdd..2d37155b2 100644
--- a/lib/Event.php
+++ b/lib/Event.php
@@ -20,7 +20,7 @@
  */
 class Event extends ApiResource
 {
-    const OBJECT_NAME = "event";
+    const OBJECT_NAME = 'event';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/ExchangeRate.php b/lib/ExchangeRate.php
index c5def7e01..1cbdbef07 100644
--- a/lib/ExchangeRate.php
+++ b/lib/ExchangeRate.php
@@ -13,7 +13,7 @@
  */
 class ExchangeRate extends ApiResource
 {
-    const OBJECT_NAME = "exchange_rate";
+    const OBJECT_NAME = 'exchange_rate';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/File.php b/lib/File.php
index a7daa8b9f..2fed775ef 100644
--- a/lib/File.php
+++ b/lib/File.php
@@ -24,7 +24,7 @@ class File extends ApiResource
     // versions, only `file` is used, but since stripe-php may be used with
     // any API version, we need to support deserializing the older
     // `file_upload` object into the same class.
-    const OBJECT_NAME = "file";
+    const OBJECT_NAME = 'file';
     const OBJECT_NAME_ALT = "file_upload";
 
     use ApiOperations\All;
diff --git a/lib/FileLink.php b/lib/FileLink.php
index 5005d4ccc..e3386beb1 100644
--- a/lib/FileLink.php
+++ b/lib/FileLink.php
@@ -19,7 +19,7 @@
  */
 class FileLink extends ApiResource
 {
-    const OBJECT_NAME = "file_link";
+    const OBJECT_NAME = 'file_link';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Invoice.php b/lib/Invoice.php
index 00005c304..59b7749fa 100644
--- a/lib/Invoice.php
+++ b/lib/Invoice.php
@@ -69,7 +69,7 @@
  */
 class Invoice extends ApiResource
 {
-    const OBJECT_NAME = "invoice";
+    const OBJECT_NAME = 'invoice';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/InvoiceItem.php b/lib/InvoiceItem.php
index 4e79e8846..567be13cb 100644
--- a/lib/InvoiceItem.php
+++ b/lib/InvoiceItem.php
@@ -30,7 +30,7 @@
  */
 class InvoiceItem extends ApiResource
 {
-    const OBJECT_NAME = "invoiceitem";
+    const OBJECT_NAME = 'invoiceitem';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/InvoiceLineItem.php b/lib/InvoiceLineItem.php
index e8e8c881d..f73dfb425 100644
--- a/lib/InvoiceLineItem.php
+++ b/lib/InvoiceLineItem.php
@@ -28,5 +28,5 @@
  */
 class InvoiceLineItem extends ApiResource
 {
-    const OBJECT_NAME = "line_item";
+    const OBJECT_NAME = 'line_item';
 }
diff --git a/lib/Issuing/Authorization.php b/lib/Issuing/Authorization.php
index ea2787c36..b2694b272 100644
--- a/lib/Issuing/Authorization.php
+++ b/lib/Issuing/Authorization.php
@@ -32,7 +32,7 @@
  */
 class Authorization extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.authorization";
+    const OBJECT_NAME = 'issuing.authorization';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/Issuing/Card.php b/lib/Issuing/Card.php
index 463b61a0a..f157f70ed 100644
--- a/lib/Issuing/Card.php
+++ b/lib/Issuing/Card.php
@@ -29,7 +29,7 @@
  */
 class Card extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.card";
+    const OBJECT_NAME = 'issuing.card';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Issuing/CardDetails.php b/lib/Issuing/CardDetails.php
index 65d3919ca..349a1c21f 100644
--- a/lib/Issuing/CardDetails.php
+++ b/lib/Issuing/CardDetails.php
@@ -17,5 +17,5 @@
  */
 class CardDetails extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.card_details";
+    const OBJECT_NAME = 'issuing.card_details';
 }
diff --git a/lib/Issuing/Cardholder.php b/lib/Issuing/Cardholder.php
index 2ac0fe49d..ac514bc12 100644
--- a/lib/Issuing/Cardholder.php
+++ b/lib/Issuing/Cardholder.php
@@ -24,7 +24,7 @@
  */
 class Cardholder extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.cardholder";
+    const OBJECT_NAME = 'issuing.cardholder';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Issuing/Dispute.php b/lib/Issuing/Dispute.php
index a5958b7a1..8fb280dc7 100644
--- a/lib/Issuing/Dispute.php
+++ b/lib/Issuing/Dispute.php
@@ -21,7 +21,7 @@
  */
 class Dispute extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.dispute";
+    const OBJECT_NAME = 'issuing.dispute';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Issuing/Transaction.php b/lib/Issuing/Transaction.php
index 14b1e7b93..711a42201 100644
--- a/lib/Issuing/Transaction.php
+++ b/lib/Issuing/Transaction.php
@@ -26,7 +26,7 @@
  */
 class Transaction extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "issuing.transaction";
+    const OBJECT_NAME = 'issuing.transaction';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/LoginLink.php b/lib/LoginLink.php
index 9f677364b..010933c20 100644
--- a/lib/LoginLink.php
+++ b/lib/LoginLink.php
@@ -13,5 +13,5 @@
  */
 class LoginLink extends ApiResource
 {
-    const OBJECT_NAME = "login_link";
+    const OBJECT_NAME = 'login_link';
 }
diff --git a/lib/Order.php b/lib/Order.php
index 6de540890..ef284be1d 100644
--- a/lib/Order.php
+++ b/lib/Order.php
@@ -33,7 +33,7 @@
  */
 class Order extends ApiResource
 {
-    const OBJECT_NAME = "order";
+    const OBJECT_NAME = 'order';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/OrderItem.php b/lib/OrderItem.php
index 6ef1242fc..6bdafc97e 100644
--- a/lib/OrderItem.php
+++ b/lib/OrderItem.php
@@ -17,5 +17,5 @@
  */
 class OrderItem extends StripeObject
 {
-    const OBJECT_NAME = "order_item";
+    const OBJECT_NAME = 'order_item';
 }
diff --git a/lib/OrderReturn.php b/lib/OrderReturn.php
index de69b3e45..8189f452b 100644
--- a/lib/OrderReturn.php
+++ b/lib/OrderReturn.php
@@ -19,7 +19,7 @@
  */
 class OrderReturn extends ApiResource
 {
-    const OBJECT_NAME = "order_return";
+    const OBJECT_NAME = 'order_return';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/PaymentIntent.php b/lib/PaymentIntent.php
index f71003e7a..4dd65f906 100644
--- a/lib/PaymentIntent.php
+++ b/lib/PaymentIntent.php
@@ -46,7 +46,7 @@
  */
 class PaymentIntent extends ApiResource
 {
-    const OBJECT_NAME = "payment_intent";
+    const OBJECT_NAME = 'payment_intent';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/PaymentMethod.php b/lib/PaymentMethod.php
index 17f287bf4..3e875eec3 100644
--- a/lib/PaymentMethod.php
+++ b/lib/PaymentMethod.php
@@ -22,7 +22,7 @@
  */
 class PaymentMethod extends ApiResource
 {
-    const OBJECT_NAME = "payment_method";
+    const OBJECT_NAME = 'payment_method';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Payout.php b/lib/Payout.php
index 42eb18839..81a8958b6 100644
--- a/lib/Payout.php
+++ b/lib/Payout.php
@@ -30,7 +30,7 @@
  */
 class Payout extends ApiResource
 {
-    const OBJECT_NAME = "payout";
+    const OBJECT_NAME = 'payout';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Person.php b/lib/Person.php
index c100218b2..33a2af140 100644
--- a/lib/Person.php
+++ b/lib/Person.php
@@ -35,7 +35,7 @@
  */
 class Person extends ApiResource
 {
-    const OBJECT_NAME = "person";
+    const OBJECT_NAME = 'person';
 
     use ApiOperations\Delete;
     use ApiOperations\Update;
diff --git a/lib/Plan.php b/lib/Plan.php
index 6555d53b7..f6ac5653d 100644
--- a/lib/Plan.php
+++ b/lib/Plan.php
@@ -30,7 +30,7 @@
  */
 class Plan extends ApiResource
 {
-    const OBJECT_NAME = "plan";
+    const OBJECT_NAME = 'plan';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Product.php b/lib/Product.php
index 6fcbc6ee1..faf44dfa4 100644
--- a/lib/Product.php
+++ b/lib/Product.php
@@ -29,7 +29,7 @@
  */
 class Product extends ApiResource
 {
-    const OBJECT_NAME = "product";
+    const OBJECT_NAME = 'product';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Radar/EarlyFraudWarning.php b/lib/Radar/EarlyFraudWarning.php
index 5131e52fc..95daac29a 100644
--- a/lib/Radar/EarlyFraudWarning.php
+++ b/lib/Radar/EarlyFraudWarning.php
@@ -17,7 +17,7 @@
  */
 class EarlyFraudWarning extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "radar.early_fraud_warning";
+    const OBJECT_NAME = 'radar.early_fraud_warning';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/Radar/ValueList.php b/lib/Radar/ValueList.php
index 6f58b5f47..772370f48 100644
--- a/lib/Radar/ValueList.php
+++ b/lib/Radar/ValueList.php
@@ -20,7 +20,7 @@
  */
 class ValueList extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "radar.value_list";
+    const OBJECT_NAME = 'radar.value_list';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Radar/ValueListItem.php b/lib/Radar/ValueListItem.php
index 055070d0d..5a79b71c9 100644
--- a/lib/Radar/ValueListItem.php
+++ b/lib/Radar/ValueListItem.php
@@ -17,7 +17,7 @@
  */
 class ValueListItem extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "radar.value_list_item";
+    const OBJECT_NAME = 'radar.value_list_item';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Recipient.php b/lib/Recipient.php
index cc984510b..944791ac8 100644
--- a/lib/Recipient.php
+++ b/lib/Recipient.php
@@ -25,7 +25,7 @@
  */
 class Recipient extends ApiResource
 {
-    const OBJECT_NAME = "recipient";
+    const OBJECT_NAME = 'recipient';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/RecipientTransfer.php b/lib/RecipientTransfer.php
index 7a2ec1f3f..c9ca46598 100644
--- a/lib/RecipientTransfer.php
+++ b/lib/RecipientTransfer.php
@@ -34,5 +34,5 @@
  */
 class RecipientTransfer extends ApiResource
 {
-    const OBJECT_NAME = "recipient_transfer";
+    const OBJECT_NAME = 'recipient_transfer';
 }
diff --git a/lib/Refund.php b/lib/Refund.php
index e88659103..078f8d4ae 100644
--- a/lib/Refund.php
+++ b/lib/Refund.php
@@ -26,7 +26,7 @@
  */
 class Refund extends ApiResource
 {
-    const OBJECT_NAME = "refund";
+    const OBJECT_NAME = 'refund';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Reporting/ReportRun.php b/lib/Reporting/ReportRun.php
index e20ec73e2..99c6db9ad 100644
--- a/lib/Reporting/ReportRun.php
+++ b/lib/Reporting/ReportRun.php
@@ -20,7 +20,7 @@
  */
 class ReportRun extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "reporting.report_run";
+    const OBJECT_NAME = 'reporting.report_run';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Reporting/ReportType.php b/lib/Reporting/ReportType.php
index 53f6b3804..e11fb2651 100644
--- a/lib/Reporting/ReportType.php
+++ b/lib/Reporting/ReportType.php
@@ -18,7 +18,7 @@
  */
 class ReportType extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "reporting.report_type";
+    const OBJECT_NAME = 'reporting.report_type';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/Review.php b/lib/Review.php
index a589cf54c..2a39c85c2 100644
--- a/lib/Review.php
+++ b/lib/Review.php
@@ -24,7 +24,7 @@
  */
 class Review extends ApiResource
 {
-    const OBJECT_NAME = "review";
+    const OBJECT_NAME = 'review';
 
     use ApiOperations\All;
     use ApiOperations\Retrieve;
diff --git a/lib/SKU.php b/lib/SKU.php
index fb26d5194..ccb5f125e 100644
--- a/lib/SKU.php
+++ b/lib/SKU.php
@@ -24,7 +24,7 @@
  */
 class SKU extends ApiResource
 {
-    const OBJECT_NAME = "sku";
+    const OBJECT_NAME = 'sku';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/SetupIntent.php b/lib/SetupIntent.php
index 6dc8b8585..69b1c39ae 100644
--- a/lib/SetupIntent.php
+++ b/lib/SetupIntent.php
@@ -28,7 +28,7 @@
  */
 class SetupIntent extends ApiResource
 {
-    const OBJECT_NAME = "setup_intent";
+    const OBJECT_NAME = 'setup_intent';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Sigma/ScheduledQueryRun.php b/lib/Sigma/ScheduledQueryRun.php
index d732255c5..8f3f49b99 100644
--- a/lib/Sigma/ScheduledQueryRun.php
+++ b/lib/Sigma/ScheduledQueryRun.php
@@ -21,7 +21,7 @@
  */
 class ScheduledQueryRun extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "scheduled_query_run";
+    const OBJECT_NAME = 'scheduled_query_run';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Retrieve;
diff --git a/lib/Source.php b/lib/Source.php
index cfc727a52..3a11f12c3 100644
--- a/lib/Source.php
+++ b/lib/Source.php
@@ -48,7 +48,7 @@
  */
 class Source extends ApiResource
 {
-    const OBJECT_NAME = "source";
+    const OBJECT_NAME = 'source';
 
     use ApiOperations\Create;
     use ApiOperations\Retrieve;
diff --git a/lib/SourceTransaction.php b/lib/SourceTransaction.php
index d004032c5..057a2092d 100644
--- a/lib/SourceTransaction.php
+++ b/lib/SourceTransaction.php
@@ -18,5 +18,5 @@
  */
 class SourceTransaction extends ApiResource
 {
-    const OBJECT_NAME = "source_transaction";
+    const OBJECT_NAME = 'source_transaction';
 }
diff --git a/lib/Subscription.php b/lib/Subscription.php
index 9232c8b37..2e33ced21 100644
--- a/lib/Subscription.php
+++ b/lib/Subscription.php
@@ -47,7 +47,7 @@
  */
 class Subscription extends ApiResource
 {
-    const OBJECT_NAME = "subscription";
+    const OBJECT_NAME = 'subscription';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/SubscriptionItem.php b/lib/SubscriptionItem.php
index c2408f70b..30792f6f3 100644
--- a/lib/SubscriptionItem.php
+++ b/lib/SubscriptionItem.php
@@ -19,7 +19,7 @@
  */
 class SubscriptionItem extends ApiResource
 {
-    const OBJECT_NAME = "subscription_item";
+    const OBJECT_NAME = 'subscription_item';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/SubscriptionSchedule.php b/lib/SubscriptionSchedule.php
index 0786a2a1a..307a05600 100644
--- a/lib/SubscriptionSchedule.php
+++ b/lib/SubscriptionSchedule.php
@@ -30,7 +30,7 @@
  */
 class SubscriptionSchedule extends ApiResource
 {
-    const OBJECT_NAME = "subscription_schedule";
+    const OBJECT_NAME = 'subscription_schedule';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/TaxId.php b/lib/TaxId.php
index bd077ff94..c2329dba1 100644
--- a/lib/TaxId.php
+++ b/lib/TaxId.php
@@ -19,7 +19,7 @@
  */
 class TaxId extends ApiResource
 {
-    const OBJECT_NAME = "tax_id";
+    const OBJECT_NAME = 'tax_id';
 
     use ApiOperations\Delete;
 
diff --git a/lib/TaxRate.php b/lib/TaxRate.php
index 604c382f4..88096e23a 100644
--- a/lib/TaxRate.php
+++ b/lib/TaxRate.php
@@ -21,7 +21,7 @@
  */
 class TaxRate extends ApiResource
 {
-    const OBJECT_NAME = "tax_rate";
+    const OBJECT_NAME = 'tax_rate';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Terminal/ConnectionToken.php b/lib/Terminal/ConnectionToken.php
index b8cf91a9c..676dec689 100644
--- a/lib/Terminal/ConnectionToken.php
+++ b/lib/Terminal/ConnectionToken.php
@@ -13,7 +13,7 @@
  */
 class ConnectionToken extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "terminal.connection_token";
+    const OBJECT_NAME = 'terminal.connection_token';
 
     use \Stripe\ApiOperations\Create;
 }
diff --git a/lib/Terminal/Location.php b/lib/Terminal/Location.php
index 73f634b32..14a34fd56 100644
--- a/lib/Terminal/Location.php
+++ b/lib/Terminal/Location.php
@@ -14,7 +14,7 @@
  */
 class Location extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "terminal.location";
+    const OBJECT_NAME = 'terminal.location';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/Terminal/Reader.php b/lib/Terminal/Reader.php
index 8f8068b40..d82578ada 100644
--- a/lib/Terminal/Reader.php
+++ b/lib/Terminal/Reader.php
@@ -19,7 +19,7 @@
  */
 class Reader extends \Stripe\ApiResource
 {
-    const OBJECT_NAME = "terminal.reader";
+    const OBJECT_NAME = 'terminal.reader';
 
     use \Stripe\ApiOperations\All;
     use \Stripe\ApiOperations\Create;
diff --git a/lib/ThreeDSecure.php b/lib/ThreeDSecure.php
index 735d0e64c..a5e8cc0c8 100644
--- a/lib/ThreeDSecure.php
+++ b/lib/ThreeDSecure.php
@@ -20,7 +20,7 @@
  */
 class ThreeDSecure extends ApiResource
 {
-    const OBJECT_NAME = "three_d_secure";
+    const OBJECT_NAME = 'three_d_secure';
 
     use ApiOperations\Create;
     use ApiOperations\Retrieve;
diff --git a/lib/Token.php b/lib/Token.php
index 50f190564..d608574b2 100644
--- a/lib/Token.php
+++ b/lib/Token.php
@@ -19,7 +19,7 @@
  */
 class Token extends ApiResource
 {
-    const OBJECT_NAME = "token";
+    const OBJECT_NAME = 'token';
 
     use ApiOperations\Create;
     use ApiOperations\Retrieve;
diff --git a/lib/Topup.php b/lib/Topup.php
index c1261d743..294446d9c 100644
--- a/lib/Topup.php
+++ b/lib/Topup.php
@@ -26,7 +26,7 @@
  */
 class Topup extends ApiResource
 {
-    const OBJECT_NAME = "topup";
+    const OBJECT_NAME = 'topup';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/Transfer.php b/lib/Transfer.php
index 4abcf4b7c..1a44ee30d 100644
--- a/lib/Transfer.php
+++ b/lib/Transfer.php
@@ -27,7 +27,7 @@
  */
 class Transfer extends ApiResource
 {
-    const OBJECT_NAME = "transfer";
+    const OBJECT_NAME = 'transfer';
 
     use ApiOperations\All;
     use ApiOperations\Create;
diff --git a/lib/TransferReversal.php b/lib/TransferReversal.php
index 7f9d984c2..3a7712a7d 100644
--- a/lib/TransferReversal.php
+++ b/lib/TransferReversal.php
@@ -20,7 +20,7 @@
  */
 class TransferReversal extends ApiResource
 {
-    const OBJECT_NAME = "transfer_reversal";
+    const OBJECT_NAME = 'transfer_reversal';
 
     use ApiOperations\Update {
         save as protected _save;
diff --git a/lib/UsageRecord.php b/lib/UsageRecord.php
index 45dabb53f..9ac4c8d73 100644
--- a/lib/UsageRecord.php
+++ b/lib/UsageRecord.php
@@ -16,5 +16,5 @@
  */
 class UsageRecord extends ApiResource
 {
-    const OBJECT_NAME = "usage_record";
+    const OBJECT_NAME = 'usage_record';
 }
diff --git a/lib/UsageRecordSummary.php b/lib/UsageRecordSummary.php
index 9d3e7a396..1b6479cb4 100644
--- a/lib/UsageRecordSummary.php
+++ b/lib/UsageRecordSummary.php
@@ -17,5 +17,5 @@
  */
 class UsageRecordSummary extends ApiResource
 {
-    const OBJECT_NAME = "usage_record_summary";
+    const OBJECT_NAME = 'usage_record_summary';
 }
diff --git a/lib/WebhookEndpoint.php b/lib/WebhookEndpoint.php
index ea6cf4e5c..f83ef9453 100644
--- a/lib/WebhookEndpoint.php
+++ b/lib/WebhookEndpoint.php
@@ -20,7 +20,7 @@
  */
 class WebhookEndpoint extends ApiResource
 {
-    const OBJECT_NAME = "webhook_endpoint";
+    const OBJECT_NAME = 'webhook_endpoint';
 
     use ApiOperations\All;
     use ApiOperations\Create;