diff --git a/changelog.txt b/changelog.txt
index 76ac4d2a5c..cf4b89995f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,6 +1,7 @@
 *** Changelog ***
 
 = 9.5.0 - xxxx-xx-xx =
+* Dev - Implements WooCommerce constants for the product types.
 * Fix - Fixes the listing of payment methods on the classic checkout when the Optimized Checkout is enabled.
 * Fix - Fixes the availability of WeChat Pay when the Optimized Checkout is enabled on the block checkout. Removes it from the classic/shortcode checkout to avoid issues.
 * Dev - Renames all references to "Smart Checkout" and "Single Payment Element" (and "SPE") to "Optimized Checkout" (and "OC"), following the feature rebranding.
diff --git a/includes/payment-methods/class-wc-stripe-express-checkout-ajax-handler.php b/includes/payment-methods/class-wc-stripe-express-checkout-ajax-handler.php
index 20e1890984..1ca106511a 100644
--- a/includes/payment-methods/class-wc-stripe-express-checkout-ajax-handler.php
+++ b/includes/payment-methods/class-wc-stripe-express-checkout-ajax-handler.php
@@ -1,4 +1,7 @@
 <?php
+
+use Automattic\WooCommerce\Enums\ProductType;
+
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
@@ -91,7 +94,7 @@ public function ajax_add_to_cart() {
 		// First empty the cart to prevent wrong calculation.
 		WC()->cart->empty_cart();
 
-		if ( ( 'variable' === $product_type || 'variable-subscription' === $product_type ) && isset( $_POST['attributes'] ) ) {
+		if ( ( ProductType::VARIABLE === $product_type || 'variable-subscription' === $product_type ) && isset( $_POST['attributes'] ) ) {
 			$attributes = wc_clean( wp_unslash( $_POST['attributes'] ) );
 
 			$data_store   = WC_Data_Store::load( 'product' );
@@ -216,7 +219,7 @@ public function ajax_get_selected_product_data() {
 				throw new Exception( sprintf( __( 'Product with the ID (%1$s) cannot be found.', 'woocommerce-gateway-stripe' ), $product_id ) );
 			}
 
-			if ( in_array( $product->get_type(), [ 'variable', 'variable-subscription' ], true ) && isset( $_POST['attributes'] ) ) {
+			if ( in_array( $product->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) && isset( $_POST['attributes'] ) ) {
 				$attributes = wc_clean( wp_unslash( $_POST['attributes'] ) );
 
 				$data_store   = WC_Data_Store::load( 'product' );
diff --git a/includes/payment-methods/class-wc-stripe-express-checkout-helper.php b/includes/payment-methods/class-wc-stripe-express-checkout-helper.php
index 087d3125be..d60a537800 100644
--- a/includes/payment-methods/class-wc-stripe-express-checkout-helper.php
+++ b/includes/payment-methods/class-wc-stripe-express-checkout-helper.php
@@ -1,5 +1,7 @@
 <?php
 
+use Automattic\WooCommerce\Enums\ProductType;
+
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
@@ -225,7 +227,7 @@ public function get_product_data() {
 			return false;
 		}
 
-		if ( in_array( $product->get_type(), [ 'variable', 'variable-subscription' ], true ) ) {
+		if ( in_array( $product->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) ) {
 			$variation_attributes = $product->get_variation_attributes();
 			$attributes           = [];
 
@@ -391,9 +393,9 @@ public function supported_product_types() {
 		return apply_filters(
 			'wc_stripe_payment_request_supported_types',
 			[
-				'simple',
-				'variable',
-				'variation',
+				ProductType::SIMPLE,
+				ProductType::VARIABLE,
+				ProductType::VARIATION,
 				'subscription',
 				'variable-subscription',
 				'subscription_variation',
@@ -656,7 +658,7 @@ public function should_show_express_checkout_button() {
 			return false;
 		}
 
-		if ( $is_product && $product && in_array( $product->get_type(), [ 'variable', 'variable-subscription' ], true ) ) {
+		if ( $is_product && $product && in_array( $product->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) ) {
 			$stock_availability = array_column( $product->get_available_variations(), 'is_in_stock' );
 			// Don't show if all product variations are out-of-stock.
 			if ( ! in_array( true, $stock_availability, true ) ) {
diff --git a/includes/payment-methods/class-wc-stripe-payment-request.php b/includes/payment-methods/class-wc-stripe-payment-request.php
index 21fd8d8540..6e0cbf664d 100644
--- a/includes/payment-methods/class-wc-stripe-payment-request.php
+++ b/includes/payment-methods/class-wc-stripe-payment-request.php
@@ -8,6 +8,8 @@
  * @since   4.0.0
  */
 
+use Automattic\WooCommerce\Enums\ProductType;
+
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
@@ -398,7 +400,7 @@ public function get_product_data() {
 		$product      = $this->get_product();
 		$variation_id = 0;
 
-		if ( in_array( $product->get_type(), [ 'variable', 'variable-subscription' ], true ) ) {
+		if ( in_array( $product->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) ) {
 			$variation_attributes = $product->get_variation_attributes();
 			$attributes           = [];
 
@@ -596,9 +598,9 @@ public function supported_product_types() {
 		return apply_filters(
 			'wc_stripe_payment_request_supported_types',
 			[
-				'simple',
-				'variable',
-				'variation',
+				ProductType::SIMPLE,
+				ProductType::VARIABLE,
+				ProductType::VARIATION,
 				'subscription',
 				'variable-subscription',
 				'subscription_variation',
@@ -1027,7 +1029,7 @@ public function should_show_payment_request_button() {
 			return false;
 		}
 
-		if ( $this->is_product() && in_array( $this->get_product()->get_type(), [ 'variable', 'variable-subscription' ], true ) ) {
+		if ( $this->is_product() && in_array( $this->get_product()->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) ) {
 			$stock_availability = array_column( $this->get_product()->get_available_variations(), 'is_in_stock' );
 			// Don't show if all product variations are out-of-stock.
 			if ( ! in_array( true, $stock_availability, true ) ) {
@@ -1372,7 +1374,7 @@ public function ajax_get_selected_product_data() {
 				throw new Exception( sprintf( __( 'Product with the ID (%1$s) cannot be found.', 'woocommerce-gateway-stripe' ), $product_id ) );
 			}
 
-			if ( in_array( $product->get_type(), [ 'variable', 'variable-subscription' ], true ) && isset( $_POST['attributes'] ) ) {
+			if ( in_array( $product->get_type(), [ ProductType::VARIABLE, 'variable-subscription' ], true ) && isset( $_POST['attributes'] ) ) {
 				$attributes = wc_clean( wp_unslash( $_POST['attributes'] ) );
 
 				$data_store   = WC_Data_Store::load( 'product' );
@@ -1479,7 +1481,7 @@ public function ajax_add_to_cart() {
 			// First empty the cart to prevent wrong calculation.
 			WC()->cart->empty_cart();
 
-			if ( ( 'variable' === $product_type || 'variable-subscription' === $product_type ) && isset( $_POST['attributes'] ) ) {
+			if ( ( ProductType::VARIABLE === $product_type || 'variable-subscription' === $product_type ) && isset( $_POST['attributes'] ) ) {
 				$attributes = wc_clean( wp_unslash( $_POST['attributes'] ) );
 
 				$data_store   = WC_Data_Store::load( 'product' );
diff --git a/readme.txt b/readme.txt
index d63d8a283a..ccf94338fb 100644
--- a/readme.txt
+++ b/readme.txt
@@ -165,6 +165,7 @@ If you get stuck, you can ask for help in the [Plugin Forum](https://wordpress.o
 
 **Internal Changes and Upcoming Features**
 
+* Dev - Implements WooCommerce constants for the product types.
 * Feature - Work to support Optimized Checkout
 * Feature - Work to support Amazon Pay
 * Dev - Splits the code coverage GitHub Actions Workflow into two separate actions