diff --git a/src/Endpoints/BalanceEndpoint.php b/src/Endpoints/BalanceEndpoint.php
index a0582c8b..50dcbf42 100644
--- a/src/Endpoints/BalanceEndpoint.php
+++ b/src/Endpoints/BalanceEndpoint.php
@@ -87,7 +87,7 @@ public function page(?string $from = null, ?int $limit = null, array $parameters
      * @param string $from The first Balance ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/BalanceTransactionEndpoint.php b/src/Endpoints/BalanceTransactionEndpoint.php
index 5dcec331..e0238007 100644
--- a/src/Endpoints/BalanceTransactionEndpoint.php
+++ b/src/Endpoints/BalanceTransactionEndpoint.php
@@ -56,7 +56,7 @@ public function listFor(Balance $balance, array $parameters = [])
      *
      * @param Balance $balance
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -86,7 +86,7 @@ public function listForId(string $balanceId, array $parameters = [])
      *
      * @param string $balanceId
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -116,7 +116,7 @@ public function listForPrimary(array $parameters = [])
      * Create an iterator for iterating over transactions for the primary balance retrieved from Mollie.
      *
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/ChargebackEndpoint.php b/src/Endpoints/ChargebackEndpoint.php
index 68efd372..d02d08ae 100644
--- a/src/Endpoints/ChargebackEndpoint.php
+++ b/src/Endpoints/ChargebackEndpoint.php
@@ -55,7 +55,7 @@ public function page(?string $from = null, ?int $limit = null, array $parameters
      * @param string $from The first chargevback ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/ClientEndpoint.php b/src/Endpoints/ClientEndpoint.php
index 5e3efb94..cdad8b50 100644
--- a/src/Endpoints/ClientEndpoint.php
+++ b/src/Endpoints/ClientEndpoint.php
@@ -74,7 +74,7 @@ public function page(?string $from = null, ?int $limit = null, array $parameters
      * @param string $from The first client ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/CollectionEndpointAbstract.php b/src/Endpoints/CollectionEndpointAbstract.php
index c36f54bc..81e05787 100644
--- a/src/Endpoints/CollectionEndpointAbstract.php
+++ b/src/Endpoints/CollectionEndpointAbstract.php
@@ -48,7 +48,7 @@ protected function rest_list(?string $from = null, ?int $limit = null, array $fi
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $filters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      * @return Generator
      */
     protected function rest_iterator(?string $from = null, ?int $limit = null, array $filters = [], bool $iterateBackwards = false): Generator
@@ -63,7 +63,7 @@ protected function rest_iterator(?string $from = null, ?int $limit = null, array
      * Iterate over a CursorCollection and yield its elements.
      *
      * @param CursorCollection $page
-     * @param boolean $iterateBackwards
+     * @param bool $iterateBackwards
      *
      * @return Generator
      */
@@ -74,7 +74,7 @@ protected function iterate(CursorCollection $page, bool $iterateBackwards = fals
                 yield $item;
             }
 
-            if (($iterateBackwards && !$page->hasPrevious()) || !$page->hasNext()) {
+            if (($iterateBackwards && ! $page->hasPrevious()) || ! $page->hasNext()) {
                 break;
             }
 
diff --git a/src/Endpoints/CustomerEndpoint.php b/src/Endpoints/CustomerEndpoint.php
index 5e48a1b4..603ba1eb 100644
--- a/src/Endpoints/CustomerEndpoint.php
+++ b/src/Endpoints/CustomerEndpoint.php
@@ -126,7 +126,7 @@ public function page(?string $from = null, ?int $limit = null, array $parameters
      * @param string $from The first customer ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/CustomerPaymentsEndpoint.php b/src/Endpoints/CustomerPaymentsEndpoint.php
index ea231b88..0738dd65 100644
--- a/src/Endpoints/CustomerPaymentsEndpoint.php
+++ b/src/Endpoints/CustomerPaymentsEndpoint.php
@@ -87,7 +87,7 @@ public function listFor(Customer $customer, ?string $from = null, ?int $limit =
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -119,7 +119,7 @@ public function listForId($customerId, ?string $from = null, ?int $limit = null,
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/InvoiceEndpoint.php b/src/Endpoints/InvoiceEndpoint.php
index afd7750d..3f5af151 100644
--- a/src/Endpoints/InvoiceEndpoint.php
+++ b/src/Endpoints/InvoiceEndpoint.php
@@ -84,7 +84,7 @@ public function all(array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/MandateEndpoint.php b/src/Endpoints/MandateEndpoint.php
index 160f4b74..75302515 100644
--- a/src/Endpoints/MandateEndpoint.php
+++ b/src/Endpoints/MandateEndpoint.php
@@ -111,7 +111,7 @@ public function listFor(Customer $customer, $from = null, $limit = null, array $
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -143,7 +143,7 @@ public function listForId($customerId, $from = null, $limit = null, array $param
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/OrderEndpoint.php b/src/Endpoints/OrderEndpoint.php
index 102b44ea..ee1eaaee 100644
--- a/src/Endpoints/OrderEndpoint.php
+++ b/src/Endpoints/OrderEndpoint.php
@@ -135,7 +135,7 @@ public function page(?string $from = null, ?int $limit = null, array $parameters
      * @param string $from The first order ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/PaymentCaptureEndpoint.php b/src/Endpoints/PaymentCaptureEndpoint.php
index d7bd6f4e..1671f095 100644
--- a/src/Endpoints/PaymentCaptureEndpoint.php
+++ b/src/Endpoints/PaymentCaptureEndpoint.php
@@ -113,7 +113,7 @@ public function listFor(Payment $payment, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -143,7 +143,7 @@ public function listForId($paymentId, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/PaymentChargebackEndpoint.php b/src/Endpoints/PaymentChargebackEndpoint.php
index e2f1d33a..42da9b03 100644
--- a/src/Endpoints/PaymentChargebackEndpoint.php
+++ b/src/Endpoints/PaymentChargebackEndpoint.php
@@ -81,7 +81,7 @@ public function listFor(Payment $payment, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -111,7 +111,7 @@ public function listForId($paymentId, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/PaymentEndpoint.php b/src/Endpoints/PaymentEndpoint.php
index a68032cc..10ad9d34 100644
--- a/src/Endpoints/PaymentEndpoint.php
+++ b/src/Endpoints/PaymentEndpoint.php
@@ -147,7 +147,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/PaymentLinkEndpoint.php b/src/Endpoints/PaymentLinkEndpoint.php
index 6e98c053..22adf5cd 100644
--- a/src/Endpoints/PaymentLinkEndpoint.php
+++ b/src/Endpoints/PaymentLinkEndpoint.php
@@ -92,7 +92,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/PaymentRefundEndpoint.php b/src/Endpoints/PaymentRefundEndpoint.php
index 28c2ee36..9ea4a168 100644
--- a/src/Endpoints/PaymentRefundEndpoint.php
+++ b/src/Endpoints/PaymentRefundEndpoint.php
@@ -81,7 +81,7 @@ public function listFor(Payment $payment, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -111,7 +111,7 @@ public function listForId($paymentId, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/ProfileEndpoint.php b/src/Endpoints/ProfileEndpoint.php
index 07647743..45d382df 100644
--- a/src/Endpoints/ProfileEndpoint.php
+++ b/src/Endpoints/ProfileEndpoint.php
@@ -148,7 +148,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/RefundEndpoint.php b/src/Endpoints/RefundEndpoint.php
index 616f15af..720d14c5 100644
--- a/src/Endpoints/RefundEndpoint.php
+++ b/src/Endpoints/RefundEndpoint.php
@@ -55,7 +55,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SettlementCaptureEndpoint.php b/src/Endpoints/SettlementCaptureEndpoint.php
index 4c08136a..03786563 100644
--- a/src/Endpoints/SettlementCaptureEndpoint.php
+++ b/src/Endpoints/SettlementCaptureEndpoint.php
@@ -50,7 +50,7 @@ public function pageForId(string $settlementId, string $from = null, int $limit
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SettlementChargebackEndpoint.php b/src/Endpoints/SettlementChargebackEndpoint.php
index 2992c322..6dc5a735 100644
--- a/src/Endpoints/SettlementChargebackEndpoint.php
+++ b/src/Endpoints/SettlementChargebackEndpoint.php
@@ -53,7 +53,7 @@ public function pageForId(string $settlementId, string $from = null, int $limit
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SettlementPaymentEndpoint.php b/src/Endpoints/SettlementPaymentEndpoint.php
index 9766bd1d..5dc6b4e4 100644
--- a/src/Endpoints/SettlementPaymentEndpoint.php
+++ b/src/Endpoints/SettlementPaymentEndpoint.php
@@ -51,7 +51,7 @@ public function pageForId($settlementId, $from = null, $limit = null, array $par
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SettlementRefundEndpoint.php b/src/Endpoints/SettlementRefundEndpoint.php
index 4984fe23..dc11f782 100644
--- a/src/Endpoints/SettlementRefundEndpoint.php
+++ b/src/Endpoints/SettlementRefundEndpoint.php
@@ -53,7 +53,7 @@ public function pageForId(string $settlementId, string $from = null, int $limit
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SettlementsEndpoint.php b/src/Endpoints/SettlementsEndpoint.php
index 6fc4c570..2de54067 100644
--- a/src/Endpoints/SettlementsEndpoint.php
+++ b/src/Endpoints/SettlementsEndpoint.php
@@ -92,7 +92,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/SubscriptionEndpoint.php b/src/Endpoints/SubscriptionEndpoint.php
index b0975049..690992fb 100644
--- a/src/Endpoints/SubscriptionEndpoint.php
+++ b/src/Endpoints/SubscriptionEndpoint.php
@@ -146,7 +146,7 @@ public function listFor(Customer $customer, $from = null, $limit = null, array $
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -178,7 +178,7 @@ public function listForId($customerId, $from = null, $limit = null, array $param
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
@@ -251,7 +251,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */
diff --git a/src/Endpoints/TerminalEndpoint.php b/src/Endpoints/TerminalEndpoint.php
index 9b1d90a3..dbd9ff12 100644
--- a/src/Endpoints/TerminalEndpoint.php
+++ b/src/Endpoints/TerminalEndpoint.php
@@ -77,7 +77,7 @@ public function page($from = null, $limit = null, array $parameters = [])
      * @param string $from The first resource ID you want to include in your list.
      * @param int $limit
      * @param array $parameters
-     * @param boolean $iterateBackwards Set to true for reverse order iteration (default is false).
+     * @param bool $iterateBackwards Set to true for reverse order iteration (default is false).
      *
      * @return Generator
      */