diff --git a/khaosz/trainer/train_context.py b/khaosz/trainer/train_context.py
index 90af6c7..ad4bdf4 100644
--- a/khaosz/trainer/train_context.py
+++ b/khaosz/trainer/train_context.py
@@ -4,7 +4,7 @@ from torch.optim.lr_scheduler import LRScheduler
 from torch.utils.data import DataLoader
 
 from khaosz.data import ResumableDistributedSampler
-from khaosz.data.checkpoint import Checkpoint
+from khaosz.data.serialization import Checkpoint
 from khaosz.trainer.strategy import StrategyFactory, BaseStrategy
 from khaosz.config.train_config import TrainConfig
 from khaosz.parallel.setup import get_current_device, get_world_size, get_rank
diff --git a/khaosz/trainer/trainer.py b/khaosz/trainer/trainer.py
index 89faf26..e1155d9 100644
--- a/khaosz/trainer/trainer.py
+++ b/khaosz/trainer/trainer.py
@@ -10,7 +10,7 @@ from khaosz.trainer.train_callback import (
     SchedulerCallback
 )
 from khaosz.trainer.train_context import TrainContext, TrainContextBuilder
-from khaosz.data.checkpoint import Checkpoint
+from khaosz.data.serialization import Checkpoint
 from khaosz.parallel.setup import spawn_parallel_fn
 
 logger = logging.getLogger(__name__)
diff --git a/tests/data/test_checkpoint.py b/tests/data/test_checkpoint.py
index 2d264c5..57071e6 100644
--- a/tests/data/test_checkpoint.py
+++ b/tests/data/test_checkpoint.py
@@ -4,7 +4,7 @@ import torch.distributed as dist
 
 from torch.optim import AdamW
 from torch.optim.lr_scheduler import CosineAnnealingLR
-from khaosz.data.checkpoint import Checkpoint
+from khaosz.data.serialization import Checkpoint
 from khaosz.parallel.setup import get_rank, spawn_parallel_fn
 
 def test_single_process():
diff --git a/tests/trainer/test_early_stopping.py b/tests/trainer/test_early_stopping.py
index 7070bc5..b8893f9 100644
--- a/tests/trainer/test_early_stopping.py
+++ b/tests/trainer/test_early_stopping.py
@@ -3,7 +3,7 @@ import torch
 import numpy as np
 from khaosz.config import *
 from khaosz.trainer import *
-from khaosz.data.checkpoint import Checkpoint
+from khaosz.data.serialization import Checkpoint
 
 def test_early_stopping_simulation(base_test_env, early_stopping_dataset):
     """Simulate early stopping behavior"""