diff --git a/odoo_whatsapp_hub.zip b/odoo_whatsapp_hub.zip
index 589ddd4..f107a26 100644
Binary files a/odoo_whatsapp_hub.zip and b/odoo_whatsapp_hub.zip differ
diff --git a/odoo_whatsapp_hub/__manifest__.py b/odoo_whatsapp_hub/__manifest__.py
index 674b972..0c5effb 100644
--- a/odoo_whatsapp_hub/__manifest__.py
+++ b/odoo_whatsapp_hub/__manifest__.py
@@ -22,8 +22,8 @@
         'views/whatsapp_conversation_views.xml',
         'views/res_partner_views.xml',
         'wizards/send_whatsapp_wizard.xml',
-        'security/ir_model_access.xml',
     ],
+    'post_init_hook': 'post_init_hook',
     'assets': {
         'web.assets_backend': [
             'odoo_whatsapp_hub/static/src/css/whatsapp.css',
diff --git a/odoo_whatsapp_hub/hooks.py b/odoo_whatsapp_hub/hooks.py
new file mode 100644
index 0000000..9877868
--- /dev/null
+++ b/odoo_whatsapp_hub/hooks.py
@@ -0,0 +1,59 @@
+from odoo import api, SUPERUSER_ID
+
+
+def post_init_hook(env):
+    """Crear permisos de acceso después de instalar el módulo."""
+    _create_access_rights(env)
+
+
+def _create_access_rights(env):
+    """Crear los registros ir.model.access para los modelos del módulo."""
+    Access = env['ir.model.access'].sudo()
+
+    # Definir permisos: (model_name, group_xmlid, read, write, create, unlink)
+    permissions = [
+        # WhatsApp Account
+        ('whatsapp.account', 'base.group_user', 1, 0, 0, 0),
+        ('whatsapp.account', 'base.group_system', 1, 1, 1, 1),
+        # WhatsApp Conversation
+        ('whatsapp.conversation', 'base.group_user', 1, 1, 1, 0),
+        ('whatsapp.conversation', 'base.group_system', 1, 1, 1, 1),
+        # WhatsApp Message
+        ('whatsapp.message', 'base.group_user', 1, 1, 1, 0),
+        ('whatsapp.message', 'base.group_system', 1, 1, 1, 1),
+        # Wizards
+        ('whatsapp.send.wizard', 'base.group_user', 1, 1, 1, 1),
+        ('whatsapp.mass.wizard', 'base.group_user', 1, 1, 1, 1),
+    ]
+
+    for model_name, group_xmlid, read, write, create, unlink in permissions:
+        # Buscar el modelo
+        model = env['ir.model'].sudo().search([('model', '=', model_name)], limit=1)
+        if not model:
+            continue
+
+        # Buscar el grupo
+        group = env.ref(group_xmlid, raise_if_not_found=False)
+        if not group:
+            continue
+
+        # Verificar si ya existe
+        existing = Access.search([
+            ('model_id', '=', model.id),
+            ('group_id', '=', group.id)
+        ], limit=1)
+
+        if existing:
+            continue
+
+        # Crear el permiso
+        access_name = f'{model_name}.{group_xmlid.split(".")[-1]}'
+        Access.create({
+            'name': access_name,
+            'model_id': model.id,
+            'group_id': group.id,
+            'perm_read': read,
+            'perm_write': write,
+            'perm_create': create,
+            'perm_unlink': unlink,
+        })
diff --git a/odoo_whatsapp_hub/security/ir_model_access.xml b/odoo_whatsapp_hub/security/ir_model_access.xml
deleted file mode 100644
index 7618eb6..0000000
--- a/odoo_whatsapp_hub/security/ir_model_access.xml
+++ /dev/null
@@ -1,84 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<odoo>
-    <data noupdate="0">
-        <!-- WhatsApp Account Access -->
-        <record id="access_whatsapp_account_user" model="ir.model.access">
-            <field name="name">whatsapp.account.user</field>
-            <field name="model_id" ref="model_whatsapp_account"/>
-            <field name="group_id" ref="base.group_user"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="0"/>
-            <field name="perm_create" eval="0"/>
-            <field name="perm_unlink" eval="0"/>
-        </record>
-        <record id="access_whatsapp_account_manager" model="ir.model.access">
-            <field name="name">whatsapp.account.manager</field>
-            <field name="model_id" ref="model_whatsapp_account"/>
-            <field name="group_id" ref="base.group_system"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="1"/>
-        </record>
-
-        <!-- WhatsApp Conversation Access -->
-        <record id="access_whatsapp_conversation_user" model="ir.model.access">
-            <field name="name">whatsapp.conversation.user</field>
-            <field name="model_id" ref="model_whatsapp_conversation"/>
-            <field name="group_id" ref="base.group_user"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="0"/>
-        </record>
-        <record id="access_whatsapp_conversation_manager" model="ir.model.access">
-            <field name="name">whatsapp.conversation.manager</field>
-            <field name="model_id" ref="model_whatsapp_conversation"/>
-            <field name="group_id" ref="base.group_system"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="1"/>
-        </record>
-
-        <!-- WhatsApp Message Access -->
-        <record id="access_whatsapp_message_user" model="ir.model.access">
-            <field name="name">whatsapp.message.user</field>
-            <field name="model_id" ref="model_whatsapp_message"/>
-            <field name="group_id" ref="base.group_user"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="0"/>
-        </record>
-        <record id="access_whatsapp_message_manager" model="ir.model.access">
-            <field name="name">whatsapp.message.manager</field>
-            <field name="model_id" ref="model_whatsapp_message"/>
-            <field name="group_id" ref="base.group_system"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="1"/>
-        </record>
-
-        <!-- WhatsApp Wizards Access -->
-        <record id="access_whatsapp_send_wizard" model="ir.model.access">
-            <field name="name">whatsapp.send.wizard</field>
-            <field name="model_id" ref="model_whatsapp_send_wizard"/>
-            <field name="group_id" ref="base.group_user"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="1"/>
-        </record>
-        <record id="access_whatsapp_mass_wizard" model="ir.model.access">
-            <field name="name">whatsapp.mass.wizard</field>
-            <field name="model_id" ref="model_whatsapp_mass_wizard"/>
-            <field name="group_id" ref="base.group_user"/>
-            <field name="perm_read" eval="1"/>
-            <field name="perm_write" eval="1"/>
-            <field name="perm_create" eval="1"/>
-            <field name="perm_unlink" eval="1"/>
-        </record>
-    </data>
-</odoo>