diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7886e41..3a147fc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,7 @@ on:
   workflow_dispatch:
   push:
     branches:
+      - v4
       - develop
       - main
   pull_request:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74a37f2..ab93961 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,22 @@
 # Release Notes for Stripe for Craft Commerce
 
-## 5.0.0
+## 5.0.1 - 2024-04-09
+
+- Fixed a bug where floating point rounding precision could cause payments/refunds to fail. ([#296](https://github.com/craftcms/commerce-stripe/pull/296))
+- Fixed a PHP error that could occur when handling a webhook request. ([#294](https://github.com/craftcms/commerce-stripe/issues/294))
+
+## 5.0.0 - 2024-03-25
 
 - Stripe now requires Craft Commerce 5.0.0-beta.1 or later.
 
+## 4.1.2.2 - 2024-04-09
+
+- Fixed a PHP error that could occur when handling a webhook request. ([#294](https://github.com/craftcms/commerce-stripe/issues/294))
+
+## 4.1.2.1 - 2024-03-28
+
+- Fixed a bug where floating point precision could cause payments/refunds to fail. ([#296](https://github.com/craftcms/commerce-stripe/pull/296))
+
 ## 4.1.2 - 2024-03-25
 
 - Fixed a bug where redirects could break when adding a new payment source. ([#259](https://github.com/craftcms/commerce-stripe/issues/259), [#289](https://github.com/craftcms/commerce-stripe/issues/289))
@@ -59,6 +72,11 @@
 - Deprecated creating new payment sources via the `commerce/subscriptions/subscribe` action.
 - Fixed a bug where `craft\commerce\stripe\base\SubscriptionGateway::getSubscriptionPlans()` was returning incorrectly-formatted data.
 
+## 3.1.2 - 2024-04-09
+
+- Fixed a PHP error that could occur when handling a webhook request. ([#294](https://github.com/craftcms/commerce-stripe/issues/294))
+- Plans’ data is now updated when the associated plan is updated in Stripe. ([#240](https://github.com/craftcms/commerce-stripe/issues/240))
+
 ## 3.1.1 - 2023-05-10
 
 - Stripe customers’ default payment methods are now kept in sync with Craft users’ primary payment sources. ([#235](https://github.com/craftcms/commerce-stripe/issues/235))
diff --git a/src/base/SubscriptionGateway.php b/src/base/SubscriptionGateway.php
index dafc434..82b5aef 100644
--- a/src/base/SubscriptionGateway.php
+++ b/src/base/SubscriptionGateway.php
@@ -869,7 +869,9 @@ protected function handleInvoiceCreated(array $data): void
             ]));
         }
 
-        $canBePaid = empty($stripeInvoice['paid']) && $stripeInvoice['billing'] === 'charge_automatically';
+        $stripeInvoiceBilling = isset($stripeInvoice['billing']) && $stripeInvoice['billing'] ? $stripeInvoice['billing'] : null;
+
+        $canBePaid = empty($stripeInvoice['paid']) && $stripeInvoiceBilling === 'charge_automatically';
 
         if (StripePlugin::getInstance()->getSettings()->chargeInvoicesImmediately && $canBePaid) {
             $invoice = $this->getStripeClient()->invoices->retrieve($stripeInvoice['id']);
diff --git a/src/gateways/PaymentIntents.php b/src/gateways/PaymentIntents.php
index 9bf8c3b..aa22ed9 100644
--- a/src/gateways/PaymentIntents.php
+++ b/src/gateways/PaymentIntents.php
@@ -288,7 +288,7 @@ public function refund(Transaction $transaction): RequestResponseInterface
             try {
                 $request = [
                     'charge' => $transaction->reference,
-                    'amount' => $transaction->paymentAmount * (10 ** $currencyService->getSubunitFor($currency)),
+                    'amount' => (int) bcmul($transaction->paymentAmount, 10 ** $currencyService->getSubunitFor($currency)),
                 ];
                 $refund = $this->getStripeClient()->refunds->create($request);
 
@@ -304,7 +304,7 @@ public function refund(Transaction $transaction): RequestResponseInterface
             if ($stripePaymentIntent->status == 'succeeded') {
                 $refund = $this->getStripeClient()->refunds->create([
                     'payment_intent' => $stripePaymentIntent->id,
-                    'amount' => $transaction->paymentAmount * (10 ** $currencyService->getSubunitFor($currency)),
+                    'amount' => (int) bcmul($transaction->paymentAmount, 10 ** $currencyService->getSubunitFor($currency)),
                 ]);
 
                 return $this->createPaymentResponseFromApiResource($refund);
@@ -640,7 +640,7 @@ protected function authorizeOrPurchase(Transaction $transaction, PaymentIntentFo
         }
 
         // Normalized amount for Stripe into minor units
-        $amount = $transaction->paymentAmount * (10 ** $currencyService->getSubunitFor($currency));
+        $amount = (int) bcmul($transaction->paymentAmount, 10 ** $currencyService->getSubunitFor($currency));
 
         /** @var PaymentIntentForm $form */
         if ($form->paymentFormType == self::PAYMENT_FORM_TYPE_CHECKOUT) {