diff --git a/fixture/vcr_cassettes/card_test/update.json b/fixture/vcr_cassettes/card_test/update.json
new file mode 100644
index 00000000..ba28bc8c
--- /dev/null
+++ b/fixture/vcr_cassettes/card_test/update.json
@@ -0,0 +1,70 @@
+[
+  {
+    "request": {
+      "body": "source[object]=card&source[number]=4111111111111111&source[cvc]=123&source[exp_month]=12&source[exp_year]=2020",
+      "headers": {
+        "Authorization": "Bearer non_empty_secret_key_string",
+        "Content-Type": "application/x-www-form-urlencoded",
+        "User-Agent": "Stripe/v1 stripity-stripe/1.4.0"
+      },
+      "method": "post",
+      "options": [],
+      "request_body": "",
+      "url": "https://api.stripe.com/v1/customers/cus_8r2j7zRowtrski/sources"
+    },
+    "response": {
+      "body": "{\n  \"id\": \"card_8wdRRGS43PIzGs\",\n  \"object\": \"card\",\n  \"address_city\": null,\n  \"address_country\": null,\n  \"address_line1\": null,\n  \"address_line1_check\": null,\n  \"address_line2\": null,\n  \"address_state\": null,\n  \"address_zip\": null,\n  \"address_zip_check\": null,\n  \"brand\": \"Visa\",\n  \"country\": \"US\",\n  \"customer\": \"cus_8wdRiJUcG4EOci\",\n  \"cvc_check\": \"pass\",\n  \"dynamic_last4\": null,\n  \"exp_month\": 12,\n  \"exp_year\": 2020,\n  \"fingerprint\": \"Ze2h9CyiqlKZzGuV\",\n  \"funding\": \"unknown\",\n  \"last4\": \"1111\",\n  \"metadata\": {},\n  \"name\": null,\n  \"tokenization_method\": null\n}\n",
+      "headers": {
+        "Server": "nginx",
+        "Date": "Thu, 04 Aug 2016 11:38:04 GMT",
+        "Content-Type": "application/json",
+        "Content-Length": "569",
+        "Connection": "keep-alive",
+        "Access-Control-Allow-Credentials": "true",
+        "Access-Control-Allow-Methods": "GET, POST, HEAD, OPTIONS, DELETE",
+        "Access-Control-Allow-Origin": "*",
+        "Access-Control-Max-Age": "300",
+        "Cache-Control": "no-cache, no-store",
+        "Request-Id": "req_8wdRp5na0zbVAg",
+        "Stripe-Version": "2016-07-06",
+        "Strict-Transport-Security": "max-age=31556926; includeSubDomains"
+      },
+      "status_code": 200,
+      "type": "ok"
+    }
+  },
+  {
+    "request": {
+      "body": "exp_month=11",
+      "headers": {
+        "Authorization": "Bearer non_empty_secret_key_string",
+        "Content-Type": "application/x-www-form-urlencoded",
+        "User-Agent": "Stripe/v1 stripity-stripe/1.4.0"
+      },
+      "method": "post",
+      "options": [],
+      "request_body": "",
+      "url": "https://api.stripe.com/v1/customers/cus_8r2j7zRowtrski/sources/card_8wdRRGS43PIzGs"
+    },
+    "response": {
+      "body": "{\n  \"id\": \"card_8wdRRGS43PIzGs\",\n  \"object\": \"card\",\n  \"address_city\": null,\n  \"address_country\": null,\n  \"address_line1\": null,\n  \"address_line1_check\": null,\n  \"address_line2\": null,\n  \"address_state\": null,\n  \"address_zip\": null,\n  \"address_zip_check\": null,\n  \"brand\": \"Visa\",\n  \"country\": \"US\",\n  \"customer\": \"cus_8wdRiJUcG4EOci\",\n  \"cvc_check\": \"pass\",\n  \"dynamic_last4\": null,\n  \"exp_month\": 11,\n  \"exp_year\": 2020,\n  \"fingerprint\": \"Ze2h9CyiqlKZzGuV\",\n  \"funding\": \"unknown\",\n  \"last4\": \"1111\",\n  \"metadata\": {},\n  \"name\": null,\n  \"tokenization_method\": null\n}\n",
+      "headers": {
+        "Server": "nginx",
+        "Date": "Thu, 04 Aug 2016 11:38:04 GMT",
+        "Content-Type": "application/json",
+        "Content-Length": "569",
+        "Connection": "keep-alive",
+        "Access-Control-Allow-Credentials": "true",
+        "Access-Control-Allow-Methods": "GET, POST, HEAD, OPTIONS, DELETE",
+        "Access-Control-Allow-Origin": "*",
+        "Access-Control-Max-Age": "300",
+        "Cache-Control": "no-cache, no-store",
+        "Request-Id": "req_8wdRLhCminnDBF",
+        "Stripe-Version": "2016-07-06",
+        "Strict-Transport-Security": "max-age=31556926; includeSubDomains"
+      },
+      "status_code": 200,
+      "type": "ok"
+    }
+  }
+]
diff --git a/lib/stripe/cards.ex b/lib/stripe/cards.ex
index 21c5a6ce..35670463 100644
--- a/lib/stripe/cards.ex
+++ b/lib/stripe/cards.ex
@@ -77,9 +77,12 @@ defmodule Stripe.Cards do
     |> Stripe.Util.handle_stripe_response
   end
 
+  def update(owner_type, owner_id, id, params) do
+    update(owner_type, owner_id, id, params, Stripe.config_or_env_key)
+  end
 
   def update(owner_type, owner_id, id, params, key) do
-    Stripe.make_request_with_key(:put, "#{endpoint_for_entity(owner_type, owner_id)}/#{id}", key, params)
+    Stripe.make_request_with_key(:post, "#{endpoint_for_entity(owner_type, owner_id)}/#{id}", key, params)
     |> Stripe.Util.handle_stripe_response
   end
 
diff --git a/test/stripe/card_test.exs b/test/stripe/card_test.exs
index df861e6b..1e2fbc1e 100644
--- a/test/stripe/card_test.exs
+++ b/test/stripe/card_test.exs
@@ -214,4 +214,48 @@ defmodule Stripe.CardTest do
       end
     end
   end
+
+  @tag disabled: false
+  test "Update with key works", %{customer: customer} do
+    use_cassette "card_test/update", match_requests_on: [:query, :request_body] do
+      new_card = [
+        source: [
+          object: "card",
+          number: "4111111111111111",
+          cvc: 123,
+          exp_month: 12,
+          exp_year: 2020
+        ]
+      ]
+
+      { :ok, card } = Stripe.Cards.create :customer, customer.id, new_card
+
+      case Stripe.Cards.update(:customer, customer.id, card.id, [exp_month: 11], Stripe.config_or_env_key) do
+        {:ok, res} -> assert res.exp_month == 11
+        {:error, err} -> flunk err
+      end
+    end
+  end
+
+  @tag disabled: false
+  test "Update works", %{customer: customer} do
+    use_cassette "card_test/update", match_requests_on: [:query, :request_body] do
+      new_card = [
+        source: [
+          object: "card",
+          number: "4111111111111111",
+          cvc: 123,
+          exp_month: 12,
+          exp_year: 2020
+        ]
+      ]
+
+      { :ok, card } = Stripe.Cards.create :customer, customer.id, new_card
+
+      case Stripe.Cards.update(:customer, customer.id, card.id, [exp_month: 11], Stripe.config_or_env_key) do
+        {:ok, res} -> assert res.exp_month == 11
+        {:error, err} -> flunk err
+      end
+    end
+  end
 end