diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8790c9..60024f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 ## 6.1.0
 
-* Adds a `unsubscribe_link` parameter to `send_email` so services can allow users to easily unsubscribe from distribution lists.
-* Adds a `unsubscribe_link` attribute to `Notification` class, so responses for get_notification include the unsubscribe link.
+* Adds a `one_click_unsubscribe_url` parameter to `send_email` so services can allow users to easily unsubscribe from distribution lists.
+* Adds a `one_click_unsubscribe_url` attribute to `Notification` class, so responses for get_notification include the unsubscribe link.
 
 ## 6.0.0
 
diff --git a/bin/test_client.rb b/bin/test_client.rb
index 0532bbc..f6ba274 100755
--- a/bin/test_client.rb
+++ b/bin/test_client.rb
@@ -121,7 +121,7 @@ def test_send_email_endpoint(client)
     personalisation: { "name" => "some name" },
     reference: "some reference",
     email_reply_to_id: ENV['EMAIL_REPLY_TO_ID'],
-    unsubscribe_link: "https://www.clovercouncil.gov.uk/unsubscribe?email_address=faye@example.com"
+    one_click_unsubscribe_url: "https://www.clovercouncil.gov.uk/unsubscribe?email_address=faye@example.com"
   )
   test_notification_response_data_type(email_resp, 'email')
   email_resp
@@ -134,7 +134,7 @@ def test_send_email_endpoint_with_document(client)
       personalisation: { name: Notifications.prepare_upload(f) },
       reference: "some reference",
       email_reply_to_id: ENV['EMAIL_REPLY_TO_ID'],
-      unsubscribe_link: "https://www.clovercouncil.gov.uk/unsubscribe?email_address=faye@example.com")
+      one_click_unsubscribe_url: "https://www.clovercouncil.gov.uk/unsubscribe?email_address=faye@example.com")
   end
 
   test_notification_response_data_type(email_resp, 'email')
@@ -324,7 +324,7 @@ def expected_fields_in_email_content
   %w(from_email
      body
      subject
-     unsubscribe_link)
+     one_click_unsubscribe_url)
 end
 
 def expected_fields_in_sms_content
@@ -348,7 +348,7 @@ def expected_fields_in_email_notification
      body
      subject
      created_at
-     unsubscribe_link)
+     one_click_unsubscribe_url)
 end
 
 def expected_fields_in_email_notification_that_are_nil
@@ -388,7 +388,7 @@ def expected_fields_in_sms_notification_that_are_nil
      subject
      created_by_name
      postage
-     unsubscribe_link)
+     one_click_unsubscribe_url)
 end
 
 def expected_fields_in_letter_notification
@@ -417,7 +417,7 @@ def expected_fields_in_letter_notification_that_are_nil
     line_5
     line_6
     created_by_name
-    unsubscribe_link
+    one_click_unsubscribe_url
   )
 end
 
@@ -449,7 +449,7 @@ def expected_fields_in_precompiled_letter_notification_that_are_nil
     phone_number
     postcode
     sent_at
-    unsubscribe_link
+    one_click_unsubscribe_url
   )
 end
 
diff --git a/lib/notifications/client/notification.rb b/lib/notifications/client/notification.rb
index cb8ed2a..7e0edfe 100644
--- a/lib/notifications/client/notification.rb
+++ b/lib/notifications/client/notification.rb
@@ -25,7 +25,7 @@ class Notification
         created_at
         completed_at
         created_by_name
-        unsubscribe_link
+        one_click_unsubscribe_url
       ).freeze
 
       attr_reader(*FIELDS)
diff --git a/lib/notifications/client/speaker.rb b/lib/notifications/client/speaker.rb
index af61317..94e6b00 100644
--- a/lib/notifications/client/speaker.rb
+++ b/lib/notifications/client/speaker.rb
@@ -47,7 +47,7 @@ def initialize(secret_token = nil, base_url = nil)
       #   id of the email address that replies to email notifications will be sent to
       # @option form_data [String] :sms_sender_id
       #   id of the sender to be used for an sms notification
-      # @option form_data [String] :unsubscribe_link
+      # @option form_data [String] :one_click_unsubscribe_url
       #   link that end user can click to unsubscribe from the distribution list. We will pass this link in the email headers.
       # @see #perform_request!
       def post(kind, form_data)