diff --git a/src/modules/rbac/entities/role.entity.ts b/src/modules/rbac/entities/role.entity.ts
index efe7dd5..091161e 100644
--- a/src/modules/rbac/entities/role.entity.ts
+++ b/src/modules/rbac/entities/role.entity.ts
@@ -26,9 +26,9 @@ export class Role {
   @Index()
   code: string;
 
-  @Column({ type: 'varchar', length: 100, nullable: true })
+  @Column({ type: 'varchar', length: 100 })
   @Index()
-  slug: string | null;
+  slug: string;
 
   @Column({ type: 'text', nullable: true })
   description: string | null;
diff --git a/src/modules/rbac/services/rbac.service.ts b/src/modules/rbac/services/rbac.service.ts
index a23075b..62996bb 100644
--- a/src/modules/rbac/services/rbac.service.ts
+++ b/src/modules/rbac/services/rbac.service.ts
@@ -38,6 +38,7 @@ export class RbacService {
       tenant_id: tenantId,
       name: dto.name,
       code: dto.code,
+      slug: dto.code.toLowerCase().replace(/[^a-z0-9]+/g, '_'),
       description: dto.description || null,
       is_system: false,
       is_active: true,