diff --git a/changelog.md b/changelog.md
index fff9c8f..270e0c9 100644
--- a/changelog.md
+++ b/changelog.md
@@ -14,6 +14,7 @@ All notable changes to this project will be documented in this file.
 - New methods in configuration-api v3.7 for canned responses: `create_canned_response`, `update_canned_response`, `list_canned_responses`, `delete_canned_response`.
 - New method `request_thread_summary` in agent-api v3.6 and v3.7.
 - New flag `name_is_default` in method `update_customer` in customer-api v3.6 and v3.7.
+- New field `phone_number` in method `update_customer` in customer-api v3.6 and v3.7.
 - New method in reports-api v3.7: report `campaigns_conversion`.
 
 ### Changed
diff --git a/livechat/customer/rtm/api/v36.py b/livechat/customer/rtm/api/v36.py
index e975851..7b85f31 100644
--- a/livechat/customer/rtm/api/v36.py
+++ b/livechat/customer/rtm/api/v36.py
@@ -441,6 +441,7 @@ def update_customer(self,
                         name: str = None,
                         name_is_default: bool = None,
                         email: str = None,
+                        phone_number: str = None,
                         avatar: str = None,
                         session_fields: list = None,
                         payload: dict = None) -> RtmResponse:
@@ -450,6 +451,7 @@ def update_customer(self,
                 name (str): Customer`s name.
                 name_is_default (bool): Flag which states if the name is default.
                 email (str): Customer`s email.
+                phone_number (str): Customer`s phone number.
                 avatar (str): Customer`s avatar.
                 session_fields (list): An array of custom object-enclosed key:value pairs.
                         Respects the order of items.
diff --git a/livechat/customer/rtm/api/v37.py b/livechat/customer/rtm/api/v37.py
index e767c8b..b112e36 100644
--- a/livechat/customer/rtm/api/v37.py
+++ b/livechat/customer/rtm/api/v37.py
@@ -441,6 +441,7 @@ def update_customer(self,
                         name: str = None,
                         name_is_default: bool = None,
                         email: str = None,
+                        phone_number: str = None,
                         avatar: str = None,
                         session_fields: list = None,
                         payload: dict = None) -> RtmResponse:
@@ -450,6 +451,7 @@ def update_customer(self,
                 name (str): Customer`s name.
                 name_is_default (bool): Flag which states if the name is default.
                 email (str): Customer`s email.
+                phone_number (str): Customer`s phone number.
                 avatar (str): Customer`s avatar.
                 session_fields (list): An array of custom object-enclosed key:value pairs.
                         Respects the order of items.
diff --git a/livechat/customer/web/api/v36.py b/livechat/customer/web/api/v36.py
index 149f2ea..7c7181c 100644
--- a/livechat/customer/web/api/v36.py
+++ b/livechat/customer/web/api/v36.py
@@ -702,6 +702,7 @@ def update_customer(self,
                         name: str = None,
                         name_is_default: bool = None,
                         email: str = None,
+                        phone_number: str = None,
                         avatar: str = None,
                         session_fields: list = None,
                         payload: dict = None,
@@ -712,6 +713,7 @@ def update_customer(self,
                 name (str): Name of the customer.
                 name_is_default (bool): Flag which states if the name is default.
                 email (str): Email of the customer.
+                phone_number (str): Phone number of the customer.
                 avatar (str): The URL of the Customer's avatar.
                 session_fields (list): An array of custom object-enclosed key:value pairs.
                                        Respects the order of items.
diff --git a/livechat/customer/web/api/v37.py b/livechat/customer/web/api/v37.py
index f9c6e7c..8e12bc0 100644
--- a/livechat/customer/web/api/v37.py
+++ b/livechat/customer/web/api/v37.py
@@ -702,6 +702,7 @@ def update_customer(self,
                         name: str = None,
                         name_is_default: bool = None,
                         email: str = None,
+                        phone_number: str = None,
                         avatar: str = None,
                         session_fields: list = None,
                         payload: dict = None,
@@ -712,6 +713,7 @@ def update_customer(self,
                 name (str): Name of the customer.
                 name_is_default (bool): Flag which states if the name is default.
                 email (str): Email of the customer.
+                phone_number (str): Phone number of the customer.
                 avatar (str): The URL of the Customer's avatar.
                 session_fields (list): An array of custom object-enclosed key:value pairs.
                                        Respects the order of items.