diff --git a/types/stripe/index.d.ts b/types/stripe/index.d.ts
index c3fd4853b7..12f2b4abea 100644
--- a/types/stripe/index.d.ts
+++ b/types/stripe/index.d.ts
@@ -4051,7 +4051,7 @@ declare namespace Stripe {
             /**
              * The card number
              */
-            number: number;
+            number: string;
 
             /**
              * Card brand. Can be Visa, American Express, MasterCard, Discover, JCB, Diners Club, or Unknown.
@@ -4167,7 +4167,7 @@ declare namespace Stripe {
             /**
              * The card number, as a string without any separators.
              */
-            number: number;
+            number: string;
 
             /**
              * Card security code. Required unless your account is registered in
diff --git a/types/stripe/stripe-tests.ts b/types/stripe/stripe-tests.ts
index 99cf3795db..b887ae6228 100644
--- a/types/stripe/stripe-tests.ts
+++ b/types/stripe/stripe-tests.ts
@@ -243,7 +243,7 @@ stripe.customers.create({
 }).then( function (customer) {
     // asynchronously called
     customer.cards.create({ card: "tok_17wV94BoqMA9o2xkhlAd3ALf"}).then(function (customer) {});
-    customer.cards.retrieve("card_17xMvXBoqMA9o2xkq6W5gamx").then(function (card) { 
+    customer.cards.retrieve("card_17xMvXBoqMA9o2xkq6W5gamx").then(function (card) {
         let strCustomer: string = <string>card.customer;
         let objCustomer: customers.ICustomer = <customers.ICustomer>card.customer;
     });
@@ -394,7 +394,7 @@ stripe.customers.createSource(
             object: "card",
             exp_month: 1,
             exp_year: 16,
-            number: 4242424242424242
+            number: '4242424242424242'
         }
     },
     function (err, card) {
@@ -409,7 +409,7 @@ stripe.customers.createSource(
             object: "card",
             exp_month: 1,
             exp_year: 16,
-            number: 4242424242424242
+            number: '4242424242424242'
         }
     }).then(
     function (card) {