diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e28296a..57a2c879 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## [4.18.0](https://github.com/plivo/plivo-python/tree/v4.18.0) (2021-07-13)
+- Power pack ID has been included to the response for the [list all messages API](https://www.plivo.com/docs/sms/api/message/list-all-messages/) and the [get message details API](https://www.plivo.com/docs/sms/api/message#retrieve-a-message).
+- Support for filtering messages by Power pack ID has been added to the [list all messages API](https://www.plivo.com/docs/sms/api/message#list-all-messages).
+
 ## [4.17.0](https://github.com/plivo/plivo-python/tree/v4.17.0) (2021-07-07)
 - Add SDK support for MPC enhancements.
 
diff --git a/plivo/resources/messages.py b/plivo/resources/messages.py
index 92a4bd30..65d28b4d 100644
--- a/plivo/resources/messages.py
+++ b/plivo/resources/messages.py
@@ -95,7 +95,8 @@ def get(self, message_uuid):
                 all_of(
                     of_type(*six.integer_types),
                     check(lambda offset: 0 <= offset, '0 <= offset')))
-        ])
+        ],
+        powerpack_id=[optional(of_type(six.text_type))])
     def list(self,
              subaccount=None,
              message_direction=None,
@@ -107,7 +108,8 @@ def list(self,
              message_state=None,
              limit=None,
              offset=None,
-             error_code=None):
+             error_code=None,
+             powerpack_id=None):
         return self.client.request(
             'GET', ('Message', ),
             to_param_dict(self.list, locals()),
diff --git a/plivo/version.py b/plivo/version.py
index 6eeddaec..ef313e95 100644
--- a/plivo/version.py
+++ b/plivo/version.py
@@ -1,2 +1,3 @@
 # -*- coding: utf-8 -*-
-__version__ = '4.17.0'
+__version__ = '4.18.0'
+
diff --git a/setup.py b/setup.py
index 542f21f7..3d6618ab 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name='plivo',
-    version='4.17.0',
+    version='4.18.0',
     description='A Python SDK to make voice calls & send SMS using Plivo and to generate Plivo XML',
     long_description=long_description,
     url='https://github.com/plivo/plivo-python',