diff --git a/lib/chartmogul/transactions/payment.rb b/lib/chartmogul/transactions/payment.rb
index ad8ba13..114518f 100644
--- a/lib/chartmogul/transactions/payment.rb
+++ b/lib/chartmogul/transactions/payment.rb
@@ -12,7 +12,7 @@ class Payment < APIResource
       writeable_attr :date, type: :time
       writeable_attr :result
       writeable_attr :external_id
-
+      writeable_attr :amount_in_cents
       writeable_attr :invoice_uuid
 
       def initialize(attributes = {})
diff --git a/lib/chartmogul/transactions/refund.rb b/lib/chartmogul/transactions/refund.rb
index 76593b7..6b5db40 100644
--- a/lib/chartmogul/transactions/refund.rb
+++ b/lib/chartmogul/transactions/refund.rb
@@ -12,7 +12,7 @@ class Refund < APIResource
       writeable_attr :date, type: :time
       writeable_attr :result
       writeable_attr :external_id
-
+      writeable_attr :amount_in_cents
       writeable_attr :invoice_uuid
 
       def initialize(attributes = {})
diff --git a/lib/chartmogul/version.rb b/lib/chartmogul/version.rb
index 6a7ca87..dc9270d 100644
--- a/lib/chartmogul/version.rb
+++ b/lib/chartmogul/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ChartMogul
-  VERSION = '1.7.0'
+  VERSION = '1.7.1'
 end
diff --git a/spec/chartmogul/transactions/payment_spec.rb b/spec/chartmogul/transactions/payment_spec.rb
index 6ffe798..d373bba 100644
--- a/spec/chartmogul/transactions/payment_spec.rb
+++ b/spec/chartmogul/transactions/payment_spec.rb
@@ -9,7 +9,8 @@
       date: '2016-01-01 12:00:00',
       result: 'successful',
       external_id: 'pay_ext_id',
-      uuid: 'tr_1234-5678-9012-34567'
+      uuid: 'tr_1234-5678-9012-34567',
+      amount_in_cents: 500
     }
   end
 
@@ -35,6 +36,10 @@
     it 'sets the external_id attribute' do
       expect(subject.external_id).to eq('pay_ext_id')
     end
+
+    it 'sets the amount_in_cents attribute' do
+      expect(subject.amount_in_cents).to eq(500)
+    end
   end
 
   describe '.new_from_json' do
@@ -58,6 +63,10 @@
     it 'sets the external_id attribute' do
       expect(subject.external_id).to eq('pay_ext_id')
     end
+
+    it 'sets the amount_in_cents attribute' do
+      expect(subject.amount_in_cents).to eq(500)
+    end
   end
 
   describe 'API Interactions', vcr: true do
@@ -90,7 +99,8 @@
         date: Time.utc(2016, 1, 1, 12),
         result: 'successful',
         external_id: 'test_tr_ext_id',
-        invoice_uuid: invoice.uuid
+        invoice_uuid: invoice.uuid,
+        amount_in_cents: 500
       ).create!
 
       expect(transaction.uuid).to be
diff --git a/spec/chartmogul/transactions/refund_spec.rb b/spec/chartmogul/transactions/refund_spec.rb
index 642ea77..fae4afd 100644
--- a/spec/chartmogul/transactions/refund_spec.rb
+++ b/spec/chartmogul/transactions/refund_spec.rb
@@ -9,7 +9,8 @@
       date: '2016-01-01 12:00:00',
       result: 'successful',
       external_id: 'ref_ext_id',
-      uuid: 'tr_1234-5678-9012-34567'
+      uuid: 'tr_1234-5678-9012-34567',
+      amount_in_cents: 500
     }
   end
 
@@ -35,6 +36,10 @@
     it 'sets the external_id attribute' do
       expect(subject.external_id).to eq('ref_ext_id')
     end
+
+    it 'sets the amount_in_cents attribute' do
+      expect(subject.amount_in_cents).to eq(500)
+    end
   end
 
   describe '.new_from_json' do
@@ -58,5 +63,9 @@
     it 'sets the external_id attribute' do
       expect(subject.external_id).to eq('ref_ext_id')
     end
+
+    it 'sets the amount_in_cents attribute' do
+      expect(subject.amount_in_cents).to eq(500)
+    end
   end
 end