diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2bf0ed39..71891159 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [4.51.0](https://github.com/plivo/plivo-ruby/tree/v4.51.0) (2023-10-16)
+**Introducing campaign_source & import partner camapign API**
+- New field campaign_source introduced
+- Import partner campaign API added
+
 ## [4.50.0](https://github.com/plivo/plivo-ruby/tree/v4.50.0) (2023-10-13)
 **Feature - WhatsApp message support**
 - Added new params `template` and new message_type `whatsapp` to [send message API](https://www.plivo.com/docs/sms/api/message#send-a-message)
diff --git a/README.md b/README.md
index d6f9a7d2..9a401558 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ The Plivo Ruby SDK makes it simpler to integrate communications into your Ruby a
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'plivo', '>= 4.50.0'
+gem 'plivo', '>= 4.51.0'
 ```
 
 And then execute:
diff --git a/lib/plivo/resources/campaign.rb b/lib/plivo/resources/campaign.rb
index 38332eca..8dd4a248 100644
--- a/lib/plivo/resources/campaign.rb
+++ b/lib/plivo/resources/campaign.rb
@@ -36,8 +36,9 @@ def get(campaign_id)
         ##
         # List all Campaign
         # @param [Hash] options
-        # @option options [String] :brand
+        # @option options [String] :brand_id
         # @option options [Status] :usecase
+        # @option options [String] :campaign_source
         # @option options [Status] :limit
         # @option options [Status] :offset
         # @return [Hash]
@@ -45,7 +46,7 @@ def list(options=nil)
         return perform_list_without_object if options.nil?
   
         params = {}
-        %i[usecase brand limit offset].each do |param|
+        %i[usecase brand_id campaign_source limit offset].each do |param|
           if options.key?(param) && valid_param?(param, options[param],
                                                    [String, Integer], true)
             params[param] = options[param]
@@ -96,6 +97,19 @@ def update(campaign_id, options=nil)
         perform_action_with_identifier(action, 'POST', options)
       end
       ##
+
+      #import campaign
+      def import(options=nil)
+        valid_param?(:options, options, Hash, true)
+        if not options[:campaign_id]
+          raise_invalid_request("campaign_id must be provided")
+        end
+        if not options[:campaign_alias]
+          raise_invalid_request("campaign_alias must be provided")
+        end
+        action = 'Import'
+        perform_action_with_identifier(action, 'POST', options)   
+      end
       # campaign number link
       #
       def number_link(options=nil)
diff --git a/lib/plivo/version.rb b/lib/plivo/version.rb
index 85e2245b..7c6fd03b 100644
--- a/lib/plivo/version.rb
+++ b/lib/plivo/version.rb
@@ -1,3 +1,3 @@
 module Plivo
-  VERSION = "4.50.0".freeze
+  VERSION = "4.51.0".freeze
 end
diff --git a/spec/mocks/campaignImportResponse.json b/spec/mocks/campaignImportResponse.json
new file mode 100644
index 00000000..950de304
--- /dev/null
+++ b/spec/mocks/campaignImportResponse.json
@@ -0,0 +1,5 @@
+{
+    "api_id": "2c6c5e16-090a-11ed-bb48-0242ac110004",
+    "campaign_id": "C1QGYD1",
+    "message": "Request to import campaign was received and is being processed."
+}
\ No newline at end of file
diff --git a/spec/resource_campaign_spec.rb b/spec/resource_campaign_spec.rb
index ed1adc6d..9e59b7ac 100644
--- a/spec/resource_campaign_spec.rb
+++ b/spec/resource_campaign_spec.rb
@@ -284,6 +284,24 @@ def to_json_delete(obj)
                      method: 'DELETE',
                      data: nil)
 end
+it 'import campaign' do
+  contents = File.read(Dir.pwd + '/spec/mocks/campaignImportResponse.json')
+  mock(200, JSON.parse(contents))
+  response = to_json_create(@api.campaign
+                              .import(options = {campaign_id:"C1QGYD1", campaign_alias:"plivo campaign"})
+                            )
+
+  contents = JSON.parse(contents)
+
+  expect(JSON.parse(response))
+    .to eql(contents)
+  compare_requests(uri: '/v1/Account/MAXXXXXXXXXXXXXXXXXX/10dlc/Campaign/Import/',
+                   method: 'POST',
+                   data: {
+                          campaign_id: "C1QGYD1",
+                          campaign_alias: "plivo campaign"
+                   })
+end
 it 'delete campaign' do
   contents = File.read(Dir.pwd + '/spec/mocks/campaignDeleteResponse.json')
   mock(200, JSON.parse(contents))