diff --git a/src/api/invoice.rs b/src/api/invoice.rs
index a1a402b..fc08423 100644
--- a/src/api/invoice.rs
+++ b/src/api/invoice.rs
@@ -45,7 +45,7 @@ impl Endpoint for GenerateInvoiceNumber {
 
     type Response = InvoiceNumber;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Borrowed("/v2/invoicing/generate-next-invoice-number")
     }
 
@@ -80,7 +80,7 @@ impl Endpoint for CreateDraftInvoice {
 
     type Response = Invoice;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Borrowed("/v2/invoicing/invoices")
     }
 
@@ -116,7 +116,7 @@ impl Endpoint for GetInvoice {
 
     type Response = Invoice;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/invoicing/invoices/{}", self.invoice_id))
     }
 
@@ -147,7 +147,7 @@ impl Endpoint for ListInvoices {
 
     type Response = InvoiceList;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Borrowed("/v2/invoicing/invoices")
     }
 
@@ -187,7 +187,7 @@ impl Endpoint for DeleteInvoice {
 
     type Response = ();
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/invoicing/invoices/{}", self.invoice_id))
     }
 
@@ -230,7 +230,7 @@ impl Endpoint for UpdateInvoice {
 
     type Response = Invoice;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/invoicing/invoices/{}", self.invoice.id))
     }
 
@@ -273,7 +273,7 @@ impl Endpoint for CancelInvoice {
 
     type Response = ();
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/invoicing/invoices/{}/cancel", self.invoice_id))
     }
 
@@ -312,7 +312,7 @@ impl Endpoint for SendInvoice {
 
     type Response = ();
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/invoicing/invoices/{}/send", self.invoice_id))
     }
 
diff --git a/src/api/orders.rs b/src/api/orders.rs
index bd0979d..50cb781 100644
--- a/src/api/orders.rs
+++ b/src/api/orders.rs
@@ -33,7 +33,7 @@ impl Endpoint for CreateOrder {
 
     type Response = Order;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Borrowed("/v2/checkout/orders")
     }
 
@@ -69,7 +69,7 @@ impl Endpoint for ShowOrderDetails {
 
     type Response = Order;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/checkout/orders/{}", self.order_id))
     }
 
@@ -132,7 +132,7 @@ impl Endpoint for CaptureOrder {
 
     type Response = Order;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/checkout/orders/{}/capture", self.order_id))
     }
 
@@ -173,7 +173,7 @@ impl Endpoint for AuthorizeOrder {
 
     type Response = Order;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/checkout/orders/{}/authorize", self.order_id))
     }
 
diff --git a/src/api/payments.rs b/src/api/payments.rs
index 8e1b05b..ce2889a 100644
--- a/src/api/payments.rs
+++ b/src/api/payments.rs
@@ -35,7 +35,7 @@ impl Endpoint for GetAuthorizedPayment {
 
     type Response = AuthorizedPaymentDetails;
 
-    fn relative_path(&self) -> Cow<str> {
+    fn relative_path(&self) -> Cow<'_, str> {
         Cow::Owned(format!("/v2/payments/authorizations/{}", self.authorization_id))
     }
 
diff --git a/src/data/invoice.rs b/src/data/invoice.rs
index 75521bd..26f2c8a 100644
--- a/src/data/invoice.rs
+++ b/src/data/invoice.rs
@@ -412,7 +412,7 @@ pub enum PaymentType {
 }
 
 /// The payment mode or method through which the invoicer can accept the payment.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum PaymentMethod {
     /// Payments can be received through bank transfers.
@@ -426,6 +426,7 @@ pub enum PaymentMethod {
     /// Payments can be received through debit card payments.
     DebitCard,
     /// Payments can be received through paypal payments.
+    #[default]
     Paypal,
     /// Payments can be received through wire transfer.
     WireTransfer,
@@ -433,12 +434,6 @@ pub enum PaymentMethod {
     Other,
 }
 
-impl Default for PaymentMethod {
-    fn default() -> Self {
-        PaymentMethod::Paypal
-    }
-}
-
 /// Payment detail
 #[skip_serializing_none]
 #[derive(Debug, Serialize, Deserialize, Clone, Builder)]
diff --git a/src/data/orders.rs b/src/data/orders.rs
index bd0e7b7..7118b32 100644
--- a/src/data/orders.rs
+++ b/src/data/orders.rs
@@ -6,10 +6,11 @@ use serde::{Deserialize, Serialize};
 use serde_with::skip_serializing_none;
 
 /// The intent to either capture payment immediately or authorize a payment for an order after order creation.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum Intent {
     /// The merchant intends to capture payment immediately after the customer makes a payment.
+    #[default]
     Capture,
     /// The merchant intends to authorize a payment and place funds on hold after the customer makes a payment.
     /// Authorized payments are guaranteed for up to three days but are available to capture for up to 29 days.
@@ -19,12 +20,6 @@ pub enum Intent {
     Authorize,
 }
 
-impl Default for Intent {
-    fn default() -> Self {
-        Intent::Capture
-    }
-}
-
 /// Represents a payer name.
 ///
 /// <https://developer.paypal.com/docs/api/orders/v2/#definition-payer.name>
@@ -197,9 +192,10 @@ pub struct PlatformFee {
 }
 
 /// The funds that are held on behalf of the merchant
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Clone, Default)]
 pub enum DisbursementMode {
     /// The funds are released to the merchant immediately.
+    #[default]
     Instant,
     /// The funds are held for a finite number of days. The actual duration depends on the region and type of integration.
     /// You can release the funds through a referenced payout.
@@ -207,12 +203,6 @@ pub enum DisbursementMode {
     Delayed,
 }
 
-impl Default for DisbursementMode {
-    fn default() -> Self {
-        DisbursementMode::Instant
-    }
-}
-
 /// Any additional payment instructions for PayPal Commerce Platform customers.
 #[skip_serializing_none]
 #[derive(Debug, Default, Serialize, Deserialize, Clone, Builder)]
@@ -225,12 +215,13 @@ pub struct PaymentInstruction {
 }
 
 /// The item category type.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum ItemCategoryType {
     /// Goods that are stored, delivered, and used in their electronic format.
     /// This value is not currently supported for API callers that leverage
     /// the [PayPal for Commerce Platform](https://www.paypal.com/us/webapps/mpp/commerce-platform) product.
+    #[default]
     DigitalGoods,
     /// A tangible item that can be shipped with proof of delivery.
     PhysicalGoods,
@@ -239,12 +230,6 @@ pub enum ItemCategoryType {
     Donation,
 }
 
-impl Default for ItemCategoryType {
-    fn default() -> Self {
-        ItemCategoryType::DigitalGoods
-    }
-}
-
 /// The name of the person to whom to ship the items.
 #[skip_serializing_none]
 #[derive(Debug, Default, Serialize, Deserialize, Clone)]
@@ -549,7 +534,7 @@ impl PurchaseUnit {
 }
 
 /// The type of landing page to show on the PayPal site for customer checkout.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum LandingPage {
     /// When the customer clicks PayPal Checkout, the customer is redirected to a page to log in to PayPal and approve the payment.
@@ -560,20 +545,16 @@ pub enum LandingPage {
     /// When the customer clicks PayPal Checkout, the customer is redirected to either a page to log in to PayPal and approve
     /// the payment or to a page to enter credit or debit card and other relevant billing information required to complete the purchase,
     /// depending on their previous interaction with PayPal.
+    #[default]
     NoPreference,
 }
 
-impl Default for LandingPage {
-    fn default() -> Self {
-        LandingPage::NoPreference
-    }
-}
-
 /// The shipping preference
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum ShippingPreference {
     /// Use the customer-provided shipping address on the PayPal site.
+    #[default]
     GetFromFile,
     /// Redact the shipping address from the PayPal site. Recommended for digital goods.
     NoShipping,
@@ -581,19 +562,14 @@ pub enum ShippingPreference {
     SetProvidedAddress,
 }
 
-impl Default for ShippingPreference {
-    fn default() -> Self {
-        ShippingPreference::GetFromFile
-    }
-}
-
 /// Configures a Continue or Pay Now checkout flow.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum UserAction {
     /// After you redirect the customer to the PayPal payment page, a Continue button appears. Use this option when
     /// the final amount is not known when the checkout flow is initiated and you want to redirect the customer
     /// to the merchant page without processing the payment.
+    #[default]
     Continue,
     /// After you redirect the customer to the PayPal payment page, a Pay Now button appears.
     /// Use this option when the final amount is known when the checkout is initiated and you want to
@@ -601,17 +577,12 @@ pub enum UserAction {
     PayNow,
 }
 
-impl Default for UserAction {
-    fn default() -> Self {
-        UserAction::Continue
-    }
-}
-
 /// The merchant-preferred payment sources.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone, Default)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 pub enum PayeePreferred {
     /// Accepts any type of payment from the customer.
+    #[default]
     Unrestricted,
     /// Accepts only immediate payment from the customer.
     /// For example, credit card, PayPal balance, or instant ACH.
@@ -619,12 +590,6 @@ pub enum PayeePreferred {
     ImmediatePaymentRequired,
 }
 
-impl Default for PayeePreferred {
-    fn default() -> Self {
-        PayeePreferred::Unrestricted
-    }
-}
-
 /// A payment method.
 #[skip_serializing_none]
 #[derive(Debug, Default, Serialize, Deserialize, Clone)]
diff --git a/src/endpoint.rs b/src/endpoint.rs
index 3ff8560..c53d28f 100644
--- a/src/endpoint.rs
+++ b/src/endpoint.rs
@@ -13,7 +13,7 @@ pub trait Endpoint {
     type Response: DeserializeOwned;
 
     /// The endpoint relative path. Must start with a `/`
-    fn relative_path(&self) -> Cow<str>;
+    fn relative_path(&self) -> Cow<'_, str>;
 
     /// The request method of this endpoint.
     fn method(&self) -> reqwest::Method;