diff --git a/types/stripe/index.d.ts b/types/stripe/index.d.ts
index f8d20071ad..7c42965281 100644
--- a/types/stripe/index.d.ts
+++ b/types/stripe/index.d.ts
@@ -129,6 +129,9 @@ declare namespace Stripe {
     type IStripeSource = cards.ICard | bitcoinReceivers.IBitcoinReceiver | bankAccounts.IBankAccount | sources.ISource;
 
     namespace accounts {
+        // Helper
+        type IExternalAccount = bankAccounts.IBankAccount | cards.ICard;
+
         interface IAccount extends IResourceObject, IAccountShared {
             /**
              * Value is "account"
@@ -210,7 +213,7 @@ declare namespace Stripe {
               * External accounts (bank accounts and debit cards) currently
               * attached to this account
               */
-            external_accounts?: IList<cards.ICard | bankAccounts.IBankAccount>;
+            external_accounts?: IList<IExternalAccount>;
         }
 
         interface IAccountCreationOptions extends IAccountUpdateOptions {
@@ -2526,7 +2529,7 @@ declare namespace Stripe {
              * dictionary containing a user’s credit card details (with the options shown
              * below). Stripe will automatically validate the card.
              */
-            source: string | cards.ICardSourceCreationOptions;
+            source: string | cards.ICardSourceCreationOptions | bankAccounts.ISourceCreationOptions;
         }
 
         interface ICustomerInvoiceSettings {
@@ -2557,6 +2560,10 @@ declare namespace Stripe {
             footer?: string;
         }
 
+        interface ICustomerBankAccountSourceCreationOptions extends ICustomerSourceCreationOptions {
+            source: bankAccounts.ISourceCreationOptions;
+        }
+
         interface ICustomerCardSourceCreationOptions extends ICustomerSourceCreationOptions {
             source: cards.ICardSourceCreationOptions;
         }
@@ -9095,6 +9102,18 @@ declare namespace Stripe {
             listCards(customerId: string, options: HeaderOptions, response?: IResponseFn<IList<cards.ICard>>): IListPromise<cards.ICard>;
             listCards(customerId: string, response?: IResponseFn<IList<cards.ICard>>): IListPromise<cards.ICard>;
 
+            /**
+             * When adding a bank account to a customer, the parameter name is source. When
+             * adding to an account, the parameter name is external_account. The
+             * value can either be a token, like the ones returned by our Stripe.js, or a
+             * dictionary containing a user’s bank account details.
+             *
+             * @returns Returns the bank account object.
+             *
+             * @param customerId The customer ID to which to add the bank account.
+             */
+            createSource(customerId: string, data: customers.ICustomerBankAccountSourceCreationOptions, options: HeaderOptions, response?: IResponseFn<bankAccounts.IBankAccount>): Promise<bankAccounts.IBankAccount>;
+            createSource(customerId: string, data: customers.ICustomerBankAccountSourceCreationOptions, response?: IResponseFn<bankAccounts.IBankAccount>): Promise<bankAccounts.IBankAccount>;
             /**
              * When adding a card to a customer, the parameter name is source. When
              * adding to an account, the parameter name is external_account. The
@@ -9109,15 +9128,15 @@ declare namespace Stripe {
             createSource(customerId: string, data: customers.ICustomerCardSourceCreationOptions, options: HeaderOptions, response?: IResponseFn<cards.ICard>): Promise<cards.ICard>;
             createSource(customerId: string, data: customers.ICustomerCardSourceCreationOptions, response?: IResponseFn<cards.ICard>): Promise<cards.ICard>;
             /**
-             * When adding a card to a customer, the parameter name is source. When
+             * When adding a card or bank account to a customer, the parameter name is source. When
              * adding to an account, the parameter name is external_account. The
              * value can either be a token, like the ones returned by our Stripe.js, or a
-             * dictionary containing a user’s credit card details.
+             * dictionary containing a user’s credit card or bank account details.
              * Stripe will automatically validate the card.
              *
              * @returns Returns the card or bank account object.
              *
-             * @param customerId The customer ID to which to add the card.
+             * @param customerId The customer ID to which to add the card or bank account.
              */
             createSource(customerId: string, data: customers.ICustomerSourceCreationOptions, options: HeaderOptions, response?: IResponseFn<IStripeSource>): Promise<IStripeSource>;
             createSource(customerId: string, data: customers.ICustomerSourceCreationOptions, response?: IResponseFn<IStripeSource>): Promise<IStripeSource>;
diff --git a/types/stripe/stripe-tests.ts b/types/stripe/stripe-tests.ts
index 0f67db9974..5e2ccb2010 100644
--- a/types/stripe/stripe-tests.ts
+++ b/types/stripe/stripe-tests.ts
@@ -635,6 +635,41 @@ stripe.customers.createSource(
     }
 );
 
+stripe.customers.createSource(
+    "cus_5rfJKDJkuxzh5Q",
+    {
+        source: {
+            country: 'US',
+            currency: 'USD',
+            account_holder_name: 'Account Holder',
+            account_holder_type: 'individual',
+            account_number: '000123456789',
+            routing_number: '110000000'
+        }
+    },
+    (err, bankAcc) => {
+        // asynchronously called
+        bankAcc; // $ExpectType IBankAccount
+    }
+);
+stripe.customers.createSource(
+    "cus_5rfJKDJkuxzh5Q",
+    {
+        source: {
+            country: 'US',
+            currency: 'USD',
+            account_holder_name: 'Account Holder',
+            account_holder_type: 'individual',
+            account_number: '000123456789',
+            routing_number: '110000000'
+        }
+    }).then(
+    (bankAcc) => {
+        // asynchronously called
+        bankAcc; // $ExpectType IBankAccount
+    }
+);
+
 stripe.customers.createSubscription(
     "cus_5rfJKDJkuxzh5Q",
     {
@@ -884,7 +919,7 @@ stripe.accounts.retrieve(
         // asynchronously called
 
         // account should have external_accounts property
-        account.external_accounts; // $ExpectType IList<ICard | IBankAccount>
+        account.external_accounts; // $ExpectType IList<IExternalAccount>
     }
 );