diff --git a/src/shared/SideBar.tsx b/src/shared/SideBar.tsx
index 189fdf5..727eafa 100644
--- a/src/shared/SideBar.tsx
+++ b/src/shared/SideBar.tsx
@@ -102,17 +102,20 @@ const SideBar: FC = () => {
 
                     </div>
 
-                    {
-                        !isLogin &&
-                        <div className='flex-1 flex items-end justify-center px-12'>
-                            <Link className='w-full' href={`${LOGIN_URL}?redirect=${encodeURIComponent(window.location.href)}`}>
-                                <Button
-                                    label='ورود | ثبت نام'
-                                />
-                            </Link>
-                        </div>
-
-                    }
+                    {typeof window !== 'undefined' && (
+                        (() => {
+                            if (!isLogin)
+                                return (
+                                    <div className='flex-1 flex items-end justify-center px-12'>
+                                        <Link className='w-full' href={`${LOGIN_URL}?redirect=${encodeURIComponent(window.location.href)}`}>
+                                            <Button
+                                                label='ورود | ثبت نام'
+                                            />
+                                        </Link>
+                                    </div>
+                                )
+                        })()
+                    )}
 
                 </div>
             </div>