diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 2b9b5d4a5..182a90af8 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -33,12 +33,12 @@ Metrics/LineLength:
 # Offense count: 32
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
-  Max: 48
+  Max: 54
 
 # Offense count: 1
 # Configuration parameters: CountComments.
 Metrics/ModuleLength:
-  Max: 308
+  Max: 314
 
 # Offense count: 6
 # Configuration parameters: CountKeywordArgs.
diff --git a/.travis.yml b/.travis.yml
index 8c214ea69..e532c5b2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ sudo: false
 env:
   global:
     # If changing this number, please also change it in `test/test_helper.rb`.
-    - STRIPE_MOCK_VERSION=0.19.0
+    - STRIPE_MOCK_VERSION=0.23.0
 
 cache:
   directories:
diff --git a/lib/stripe.rb b/lib/stripe.rb
index d552fe2ca..3fa139d01 100644
--- a/lib/stripe.rb
+++ b/lib/stripe.rb
@@ -60,6 +60,12 @@
 require "stripe/invoice_item"
 require "stripe/invoice_line_item"
 require "stripe/issuer_fraud_record"
+require "stripe/issuing/authorization"
+require "stripe/issuing/card"
+require "stripe/issuing/cardholder"
+require "stripe/issuing/card_details"
+require "stripe/issuing/dispute"
+require "stripe/issuing/transaction"
 require "stripe/login_link"
 require "stripe/order"
 require "stripe/order_return"
diff --git a/lib/stripe/issuing/authorization.rb b/lib/stripe/issuing/authorization.rb
new file mode 100644
index 000000000..048982f53
--- /dev/null
+++ b/lib/stripe/issuing/authorization.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class Authorization < Stripe::APIResource
+      extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
+
+      OBJECT_NAME = "issuing.authorization".freeze
+
+      def approve(params = {}, opts = {})
+        resp, opts = request(:post, resource_url + "/approve", params, opts)
+        initialize_from(resp.data, opts)
+      end
+
+      def decline(params = {}, opts = {})
+        resp, opts = request(:post, resource_url + "/decline", params, opts)
+        initialize_from(resp.data, opts)
+      end
+    end
+  end
+end
diff --git a/lib/stripe/issuing/card.rb b/lib/stripe/issuing/card.rb
new file mode 100644
index 000000000..9ec4805ed
--- /dev/null
+++ b/lib/stripe/issuing/card.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class Card < Stripe::APIResource
+      extend Stripe::APIOperations::Create
+      extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
+
+      OBJECT_NAME = "issuing.card".freeze
+
+      def details(params = {}, opts = {})
+        resp, opts = request(:get, resource_url + "/details", params, opts)
+        Util.convert_to_stripe_object(resp.data, opts)
+      end
+    end
+  end
+end
diff --git a/lib/stripe/issuing/card_details.rb b/lib/stripe/issuing/card_details.rb
new file mode 100644
index 000000000..4d483cd57
--- /dev/null
+++ b/lib/stripe/issuing/card_details.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class CardDetails < Stripe::StripeObject
+      OBJECT_NAME = "issuing.card_details".freeze
+    end
+  end
+end
diff --git a/lib/stripe/issuing/cardholder.rb b/lib/stripe/issuing/cardholder.rb
new file mode 100644
index 000000000..2c1fd48b8
--- /dev/null
+++ b/lib/stripe/issuing/cardholder.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class Cardholder < Stripe::APIResource
+      extend Stripe::APIOperations::Create
+      extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
+
+      OBJECT_NAME = "issuing.cardholder".freeze
+    end
+  end
+end
diff --git a/lib/stripe/issuing/dispute.rb b/lib/stripe/issuing/dispute.rb
new file mode 100644
index 000000000..251a8892d
--- /dev/null
+++ b/lib/stripe/issuing/dispute.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class Dispute < Stripe::APIResource
+      extend Stripe::APIOperations::Create
+      extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
+
+      OBJECT_NAME = "issuing.dispute".freeze
+    end
+  end
+end
diff --git a/lib/stripe/issuing/transaction.rb b/lib/stripe/issuing/transaction.rb
new file mode 100644
index 000000000..a2a64265d
--- /dev/null
+++ b/lib/stripe/issuing/transaction.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Stripe
+  module Issuing
+    class Transaction < Stripe::APIResource
+      extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
+
+      OBJECT_NAME = "issuing.transaction".freeze
+    end
+  end
+end
diff --git a/lib/stripe/util.rb b/lib/stripe/util.rb
index 3d5f4d734..13011e933 100644
--- a/lib/stripe/util.rb
+++ b/lib/stripe/util.rb
@@ -45,51 +45,57 @@ def self.object_classes
         ListObject::OBJECT_NAME => ListObject,
 
         # business objects
-        Account::OBJECT_NAME              => Account,
-        AlipayAccount::OBJECT_NAME        => AlipayAccount,
-        ApplePayDomain::OBJECT_NAME       => ApplePayDomain,
-        ApplicationFee::OBJECT_NAME       => ApplicationFee,
-        ApplicationFeeRefund::OBJECT_NAME => ApplicationFeeRefund,
-        Balance::OBJECT_NAME              => Balance,
-        BalanceTransaction::OBJECT_NAME   => BalanceTransaction,
-        BankAccount::OBJECT_NAME          => BankAccount,
-        BitcoinReceiver::OBJECT_NAME      => BitcoinReceiver,
-        BitcoinTransaction::OBJECT_NAME   => BitcoinTransaction,
-        Card::OBJECT_NAME                 => Card,
-        Charge::OBJECT_NAME               => Charge,
-        CountrySpec::OBJECT_NAME          => CountrySpec,
-        Coupon::OBJECT_NAME               => Coupon,
-        Customer::OBJECT_NAME             => Customer,
-        Dispute::OBJECT_NAME              => Dispute,
-        EphemeralKey::OBJECT_NAME         => EphemeralKey,
-        Event::OBJECT_NAME                => Event,
-        ExchangeRate::OBJECT_NAME         => ExchangeRate,
-        FileUpload::OBJECT_NAME           => FileUpload,
-        Invoice::OBJECT_NAME              => Invoice,
-        InvoiceItem::OBJECT_NAME          => InvoiceItem,
-        InvoiceLineItem::OBJECT_NAME      => InvoiceLineItem,
-        IssuerFraudRecord::OBJECT_NAME    => IssuerFraudRecord,
-        LoginLink::OBJECT_NAME            => LoginLink,
-        Order::OBJECT_NAME                => Order,
-        OrderReturn::OBJECT_NAME          => OrderReturn,
-        PaymentIntent::OBJECT_NAME        => PaymentIntent,
-        Payout::OBJECT_NAME               => Payout,
-        Plan::OBJECT_NAME                 => Plan,
-        Product::OBJECT_NAME              => Product,
-        Recipient::OBJECT_NAME            => Recipient,
-        RecipientTransfer::OBJECT_NAME    => RecipientTransfer,
-        Refund::OBJECT_NAME               => Refund,
-        Reversal::OBJECT_NAME             => Reversal,
-        SKU::OBJECT_NAME                  => SKU,
-        Source::OBJECT_NAME               => Source,
-        SourceTransaction::OBJECT_NAME    => SourceTransaction,
-        Subscription::OBJECT_NAME         => Subscription,
-        SubscriptionItem::OBJECT_NAME     => SubscriptionItem,
-        ThreeDSecure::OBJECT_NAME         => ThreeDSecure,
-        Token::OBJECT_NAME                => Token,
-        Topup::OBJECT_NAME                => Topup,
-        Transfer::OBJECT_NAME             => Transfer,
-        UsageRecord::OBJECT_NAME          => UsageRecord,
+        Account::OBJECT_NAME                => Account,
+        AlipayAccount::OBJECT_NAME          => AlipayAccount,
+        ApplePayDomain::OBJECT_NAME         => ApplePayDomain,
+        ApplicationFee::OBJECT_NAME         => ApplicationFee,
+        ApplicationFeeRefund::OBJECT_NAME   => ApplicationFeeRefund,
+        Balance::OBJECT_NAME                => Balance,
+        BalanceTransaction::OBJECT_NAME     => BalanceTransaction,
+        BankAccount::OBJECT_NAME            => BankAccount,
+        BitcoinReceiver::OBJECT_NAME        => BitcoinReceiver,
+        BitcoinTransaction::OBJECT_NAME     => BitcoinTransaction,
+        Card::OBJECT_NAME                   => Card,
+        Charge::OBJECT_NAME                 => Charge,
+        CountrySpec::OBJECT_NAME            => CountrySpec,
+        Coupon::OBJECT_NAME                 => Coupon,
+        Customer::OBJECT_NAME               => Customer,
+        Dispute::OBJECT_NAME                => Dispute,
+        EphemeralKey::OBJECT_NAME           => EphemeralKey,
+        Event::OBJECT_NAME                  => Event,
+        ExchangeRate::OBJECT_NAME           => ExchangeRate,
+        FileUpload::OBJECT_NAME             => FileUpload,
+        Invoice::OBJECT_NAME                => Invoice,
+        InvoiceItem::OBJECT_NAME            => InvoiceItem,
+        InvoiceLineItem::OBJECT_NAME        => InvoiceLineItem,
+        IssuerFraudRecord::OBJECT_NAME      => IssuerFraudRecord,
+        Issuing::Authorization::OBJECT_NAME => Issuing::Authorization,
+        Issuing::Card::OBJECT_NAME          => Issuing::Card,
+        Issuing::CardDetails::OBJECT_NAME   => Issuing::CardDetails,
+        Issuing::Cardholder::OBJECT_NAME    => Issuing::Cardholder,
+        Issuing::Dispute::OBJECT_NAME       => Issuing::Dispute,
+        Issuing::Transaction::OBJECT_NAME   => Issuing::Transaction,
+        LoginLink::OBJECT_NAME              => LoginLink,
+        Order::OBJECT_NAME                  => Order,
+        OrderReturn::OBJECT_NAME            => OrderReturn,
+        PaymentIntent::OBJECT_NAME          => PaymentIntent,
+        Payout::OBJECT_NAME                 => Payout,
+        Plan::OBJECT_NAME                   => Plan,
+        Product::OBJECT_NAME                => Product,
+        Recipient::OBJECT_NAME              => Recipient,
+        RecipientTransfer::OBJECT_NAME      => RecipientTransfer,
+        Refund::OBJECT_NAME                 => Refund,
+        Reversal::OBJECT_NAME               => Reversal,
+        SKU::OBJECT_NAME                    => SKU,
+        Source::OBJECT_NAME                 => Source,
+        SourceTransaction::OBJECT_NAME      => SourceTransaction,
+        Subscription::OBJECT_NAME           => Subscription,
+        SubscriptionItem::OBJECT_NAME       => SubscriptionItem,
+        ThreeDSecure::OBJECT_NAME           => ThreeDSecure,
+        Token::OBJECT_NAME                  => Token,
+        Topup::OBJECT_NAME                  => Topup,
+        Transfer::OBJECT_NAME               => Transfer,
+        UsageRecord::OBJECT_NAME            => UsageRecord,
       }
     end
 
diff --git a/test/stripe/api_operations_test.rb b/test/stripe/api_operations_test.rb
index bad71667e..ef39144ee 100644
--- a/test/stripe/api_operations_test.rb
+++ b/test/stripe/api_operations_test.rb
@@ -38,6 +38,8 @@ class MainResource < APIResource
         OBJECT_NAME = "mainresource".freeze
         nested_resource_class_methods :nested,
                                       operations: %i[create retrieve update delete list]
+
+        OBJECT_NAME = "mainresource".freeze
       end
 
       should "define a create method" do
diff --git a/test/stripe/issuing/authorization_test.rb b/test/stripe/issuing/authorization_test.rb
new file mode 100644
index 000000000..8e912dd29
--- /dev/null
+++ b/test/stripe/issuing/authorization_test.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require File.expand_path("../../../test_helper", __FILE__)
+
+module Stripe
+  module Issuing
+    class AuthorizationTest < Test::Unit::TestCase
+      should "be listable" do
+        authorizations = Stripe::Issuing::Authorization.list
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/authorizations"
+        assert authorizations.data.is_a?(Array)
+        assert authorizations.data[0].is_a?(Stripe::Issuing::Authorization)
+      end
+
+      should "be retrievable" do
+        authorization = Stripe::Issuing::Authorization.retrieve("iauth_123")
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/authorizations/iauth_123"
+        assert authorization.is_a?(Stripe::Issuing::Authorization)
+      end
+
+      should "be saveable" do
+        authorization = Stripe::Issuing::Authorization.retrieve("iauth_123")
+        authorization.metadata["key"] = "value"
+        authorization.save
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/authorizations/#{authorization.id}"
+        assert authorization.is_a?(Stripe::Issuing::Authorization)
+      end
+
+      should "be updateable" do
+        authorization = Stripe::Issuing::Authorization.update("iauth_123", metadata: { foo: "bar" })
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/authorizations/iauth_123"
+        assert authorization.is_a?(Stripe::Issuing::Authorization)
+      end
+
+      should "be approveable" do
+        authorization = Stripe::Issuing::Authorization.retrieve("iauth_123")
+        authorization.approve
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/authorizations/iauth_123/approve"
+        assert authorization.is_a?(Stripe::Issuing::Authorization)
+      end
+
+      should "be declineable" do
+        authorization = Stripe::Issuing::Authorization.retrieve("iauth_123")
+        authorization.decline
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/authorizations/iauth_123/decline"
+        assert authorization.is_a?(Stripe::Issuing::Authorization)
+      end
+    end
+  end
+end
diff --git a/test/stripe/issuing/card_test.rb b/test/stripe/issuing/card_test.rb
new file mode 100644
index 000000000..e55712974
--- /dev/null
+++ b/test/stripe/issuing/card_test.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require File.expand_path("../../../test_helper", __FILE__)
+
+module Stripe
+  module Issuing
+    class CardTest < Test::Unit::TestCase
+      should "be creatable" do
+        card = Stripe::Issuing::Card.create(
+          currency: "usd",
+          type: "physical"
+        )
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cards"
+        assert card.is_a?(Stripe::Issuing::Card)
+      end
+
+      should "be listable" do
+        cards = Stripe::Issuing::Card.list
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/cards"
+        assert cards.data.is_a?(Array)
+        assert cards.data[0].is_a?(Stripe::Issuing::Card)
+      end
+
+      should "be retrievable" do
+        card = Stripe::Issuing::Card.retrieve("ic_123")
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/cards/ic_123"
+        assert card.is_a?(Stripe::Issuing::Card)
+      end
+
+      should "be saveable" do
+        card = Stripe::Issuing::Card.retrieve("ic_123")
+        card.metadata["key"] = "value"
+        card.save
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cards/ic_123"
+        assert card.is_a?(Stripe::Issuing::Card)
+      end
+
+      should "be updateable" do
+        card = Stripe::Issuing::Card.update("ic_123", metadata: { foo: "bar" })
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cards/ic_123"
+        assert card.is_a?(Stripe::Issuing::Card)
+      end
+
+      should "be able to retrieve card details" do
+        card = Stripe::Issuing::Card.retrieve("ic_123")
+
+        card_details = card.details
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/cards/ic_123/details"
+        assert card_details.is_a?(Stripe::Issuing::CardDetails)
+      end
+    end
+  end
+end
diff --git a/test/stripe/issuing/cardholder_test.rb b/test/stripe/issuing/cardholder_test.rb
new file mode 100644
index 000000000..dc10711ab
--- /dev/null
+++ b/test/stripe/issuing/cardholder_test.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require File.expand_path("../../../test_helper", __FILE__)
+
+module Stripe
+  module Issuing
+    class CardholderTest < Test::Unit::TestCase
+      should "be creatable" do
+        cardholder = Stripe::Issuing::Cardholder.create(
+          billing: {
+            address: {
+              city: "city",
+              country: "US",
+              line1: "line1",
+              postal_code: "postal_code",
+            },
+          },
+          name: "Jenny Rosen",
+          type: "individual"
+        )
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cardholders"
+        assert cardholder.is_a?(Stripe::Issuing::Cardholder)
+      end
+
+      should "be listable" do
+        cardholders = Stripe::Issuing::Cardholder.list
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/cardholders"
+        assert cardholders.data.is_a?(Array)
+        assert cardholders.data[0].is_a?(Stripe::Issuing::Cardholder)
+      end
+
+      should "be retrievable" do
+        cardholder = Stripe::Issuing::Cardholder.retrieve("ich_123")
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/cardholders/ich_123"
+        assert cardholder.is_a?(Stripe::Issuing::Cardholder)
+      end
+
+      should "be saveable" do
+        cardholder = Stripe::Issuing::Cardholder.retrieve("ich_123")
+        cardholder.metadata["key"] = "value"
+        cardholder.save
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cardholders/#{cardholder.id}"
+        assert cardholder.is_a?(Stripe::Issuing::Cardholder)
+      end
+
+      should "be updateable" do
+        cardholder = Stripe::Issuing::Cardholder.update("ich_123", metadata: { foo: "bar" })
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/cardholders/ich_123"
+        assert cardholder.is_a?(Stripe::Issuing::Cardholder)
+      end
+    end
+  end
+end
diff --git a/test/stripe/issuing/dispute_test.rb b/test/stripe/issuing/dispute_test.rb
new file mode 100644
index 000000000..9ad4a1072
--- /dev/null
+++ b/test/stripe/issuing/dispute_test.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require File.expand_path("../../../test_helper", __FILE__)
+
+module Stripe
+  module Issuing
+    class DisputeTest < Test::Unit::TestCase
+      should "be creatable" do
+        dispute = Stripe::Issuing::Dispute.create(
+          reason: "fraudulent",
+          transaction: "ipi_123"
+        )
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/disputes"
+        assert dispute.is_a?(Stripe::Issuing::Dispute)
+      end
+
+      should "be listable" do
+        disputes = Stripe::Issuing::Dispute.list
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/disputes"
+        assert disputes.data.is_a?(Array)
+        assert disputes.data[0].is_a?(Stripe::Issuing::Dispute)
+      end
+
+      should "be retrievable" do
+        dispute = Stripe::Issuing::Dispute.retrieve("ich_123")
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/disputes/ich_123"
+        assert dispute.is_a?(Stripe::Issuing::Dispute)
+      end
+
+      should "be saveable" do
+        dispute = Stripe::Issuing::Dispute.retrieve("ich_123")
+        dispute.metadata["key"] = "value"
+        dispute.save
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/disputes/#{dispute.id}"
+        assert dispute.is_a?(Stripe::Issuing::Dispute)
+      end
+
+      should "be updateable" do
+        dispute = Stripe::Issuing::Dispute.update("ich_123", metadata: { foo: "bar" })
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/disputes/ich_123"
+        assert dispute.is_a?(Stripe::Issuing::Dispute)
+      end
+    end
+  end
+end
diff --git a/test/stripe/issuing/transaction_test.rb b/test/stripe/issuing/transaction_test.rb
new file mode 100644
index 000000000..5f2eb0216
--- /dev/null
+++ b/test/stripe/issuing/transaction_test.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require File.expand_path("../../../test_helper", __FILE__)
+
+module Stripe
+  module Issuing
+    class TransactionTest < Test::Unit::TestCase
+      should "be listable" do
+        stub_request(:get, "#{Stripe.api_base}/v1/issuing/transactions")
+          .to_return(body: JSON.generate(object: "list", data: [{ id: "ipi_123", object: "issuing.transaction" }]))
+
+        transactions = Stripe::Issuing::Transaction.list
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/transactions"
+        assert transactions.data.is_a?(Array)
+        assert transactions.data[0].is_a?(Stripe::Issuing::Transaction)
+      end
+
+      should "be retrievable" do
+        stub_request(:get, "#{Stripe.api_base}/v1/issuing/transactions/ipi_123")
+          .to_return(body: JSON.generate(id: "ipi_123", object: "issuing.transaction"))
+
+        transaction = Stripe::Issuing::Transaction.retrieve("ipi_123")
+        assert_requested :get, "#{Stripe.api_base}/v1/issuing/transactions/ipi_123"
+        assert transaction.is_a?(Stripe::Issuing::Transaction)
+      end
+
+      should "be saveable" do
+        stub_request(:post, "#{Stripe.api_base}/v1/issuing/transactions/ipi_123")
+          .to_return(body: JSON.generate(id: "ipi_123", object: "issuing.transaction"))
+
+        transaction = Stripe::Issuing::Transaction.construct_from(id: "ipi_123", object: "issuing.transaction", metadata: {})
+        transaction.metadata["key"] = "value"
+        transaction.save
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/transactions/#{transaction.id}"
+        assert transaction.is_a?(Stripe::Issuing::Transaction)
+      end
+
+      should "be updateable" do
+        stub_request(:post, "#{Stripe.api_base}/v1/issuing/transactions/ipi_123")
+          .to_return(body: JSON.generate(id: "ipi_123", object: "issuing.transaction"))
+
+        transaction = Stripe::Issuing::Transaction.update("ipi_123", metadata: { foo: "bar" })
+        assert_requested :post, "#{Stripe.api_base}/v1/issuing/transactions/ipi_123"
+        assert transaction.is_a?(Stripe::Issuing::Transaction)
+      end
+    end
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 0a722c379..d608f5ff6 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -16,7 +16,7 @@
 require File.expand_path("../test_data", __FILE__)
 
 # If changing this number, please also change it in `.travis.yml`.
-MOCK_MINIMUM_VERSION = "0.16.0".freeze
+MOCK_MINIMUM_VERSION = "0.23.0".freeze
 MOCK_PORT = ENV["STRIPE_MOCK_PORT"] || 12_111
 
 # Disable all real network connections except those that are outgoing to