diff --git a/core/apps/accounts/migrations/0005_rename_permission_tab_permission_permission_tabs.py b/core/apps/accounts/migrations/0005_rename_permission_tab_permission_permission_tabs.py
new file mode 100644
index 0000000..6bef335
--- /dev/null
+++ b/core/apps/accounts/migrations/0005_rename_permission_tab_permission_permission_tabs.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.2.7 on 2026-04-28 11:02
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('accounts', '0004_permissiontoaction_permissiontotab_permission_role_and_more'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='permission',
+            old_name='permission_tab',
+            new_name='permission_tabs',
+        ),
+    ]
diff --git a/core/apps/accounts/models/permission.py b/core/apps/accounts/models/permission.py
index 68b7f82..9eea320 100644
--- a/core/apps/accounts/models/permission.py
+++ b/core/apps/accounts/models/permission.py
@@ -33,7 +33,7 @@ class PermissionToTab(AbstractBaseModel):
 class Permission(AbstractBaseModel):
     name = models.CharField(max_length=200)
     code = models.CharField(max_length=100, unique=True)
-    permission_tab = models.ManyToManyField(PermissionToTab, related_name='permissions')
+    permission_tabs = models.ManyToManyField(PermissionToTab, related_name='permissions')
 
     def __str__(self):
         return f'{self.name} - {self.code}'
diff --git a/core/apps/accounts/serializers/permission.py b/core/apps/accounts/serializers/permission.py
index fdf1d37..b219fc0 100644
--- a/core/apps/accounts/serializers/permission.py
+++ b/core/apps/accounts/serializers/permission.py
@@ -6,21 +6,32 @@ from core.apps.accounts.models.permission import PermissionToAction, PermissionT
 class PermissionToActionSerializer(serializers.ModelSerializer):
     class Meta:
         model = PermissionToAction
-        fields = "__all__"
+        fields = ['id', 'name']
+
 
 class PermissionToTabSerializer(serializers.ModelSerializer):
+    permission_to_actions = PermissionToActionSerializer(many=True)
+
     class Meta:
         model = PermissionToTab
-        fields = '__all__'
+        fields = ['id', 'name', 'permission_to_actions']
 
 
 class PermissionSerializer(serializers.ModelSerializer):
+    permission_to_tabs = PermissionToTabSerializer(many=True)
+
     class Meta:
         model = Permission
-        fields = '__all__'
+        fields = ['id', 'name', 'permission_to_tabs']
 
 
-class RoleSerializer(serializers.ModelSerializer):
+class RoleListSerializer(serializers.ModelSerializer):
+    permissions = PermissionSerializer(many=True)
+    permission_to_tabs = PermissionToTabSerializer(many=True)
+    permission_to_actions = PermissionToActionSerializer(many=True)
+
     class Meta:
         model = Role
-        fields = '__all__'
\ No newline at end of file
+        fields = [
+            'id', 'name', 'comment', 'permissions', 'permission_to_tabs', 'permission_to_actions',
+        ]
diff --git a/core/apps/accounts/views/permission.py b/core/apps/accounts/views/permission.py
index 4d82f49..3499b46 100644
--- a/core/apps/accounts/views/permission.py
+++ b/core/apps/accounts/views/permission.py
@@ -5,7 +5,7 @@ from rest_framework.viewsets import ModelViewSet
 
 from core.apps.accounts.models.permission import PermissionToAction, PermissionToTab, Permission, Role
 from core.apps.accounts.serializers.permission import PermissionToActionSerializer, PermissionToTabSerializer, \
-    PermissionSerializer, RoleSerializer
+    PermissionSerializer, RoleListSerializer
 
 
 @extend_schema(tags=["permission"])
@@ -39,4 +39,4 @@ class PermissionViewSet(BaseViewSetMixin, ModelViewSet):
 
 class RoleViewSet(BaseViewSetMixin, ModelViewSet):
     queryset = Role.objects.all()
-    serializer_class = RoleSerializer
+    serializer_class = RoleListSerializer
diff --git a/core/apps/evaluation/serializers/certificate/certificate.py b/core/apps/evaluation/serializers/certificate/certificate.py
index 3eaeb1f..601adbf 100644
--- a/core/apps/evaluation/serializers/certificate/certificate.py
+++ b/core/apps/evaluation/serializers/certificate/certificate.py
@@ -16,9 +16,7 @@ class BaseCertificateSerializer(serializers.ModelSerializer):
     def get_file(self, obj):
         if obj.file:
             request = self.context.get('request')
-            if request:
-                return request.build_absolute_uri(obj.file.url)
-            return obj.file.url
+            return request.build_absolute_uri(obj.file.url)
         return None