diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index 69a3607..60533b8 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
   title: WhatsApp API MultiDevice
-  version: 3.10.1
+  version: 3.11.0
   description: This API is used for sending whatsapp via API
 servers:
   - url: http://localhost:3000
@@ -773,7 +773,53 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/SendResponse'
+                $ref: '#/components/schemas/CreateGroupResponse'
+        '400':
+          description: Bad Request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorBadRequest'
+        '500':
+          description: Internal Server Error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorInternalServer'
+  /group/participants:
+    post:
+      operationId: addParticipantToGroup
+      tags:
+        - group
+      summary: Adding more participants to group
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                group_id:
+                  type: string
+                  example: '120363228882361111'
+                participants:
+                  type: array
+                  items:
+                    type: string
+                    example:
+                      - '6819241294719274'
+                      - '6829241294719274'
+                      - '6839241294719274'
+                  example:
+                    - '6819241294719274'
+                    - '6829241294719274'
+                    - '6839241294719274'
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/AddParticipantToGroupResponse'
         '400':
           description: Bad Request
           content:
@@ -807,7 +853,7 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/SendResponse'
+                $ref: '#/components/schemas/GenericResponse'
         '400':
           description: Bad Request
           content:
@@ -857,6 +903,44 @@ paths:
 
 components:
   schemas:
+    CreateGroupResponse:
+      type: object
+      properties:
+        code:
+          type: string
+          example: SUCCESS
+        message:
+          type: string
+          example: Success get list groups
+        results:
+          type: object
+          properties:
+            group_id:
+              type: string
+              example: 1203632782168851111@g.us
+    AddParticipantToGroupResponse:
+      type: object
+      properties:
+        code:
+          type: string
+          example: SUCCESS
+        message:
+          type: string
+          example: Success get list groups
+        results:
+          type: array
+          items:
+            properties:
+              participant:
+                type: string
+                example: '6289987391723@s.whatsapp.net'
+              status:
+                type: string
+                example: success
+              message:
+                type: string
+                example: Participant added
+
     UserGroupResponse:
       type: object
       properties: