diff --git a/vllm_omni/config/config_factory.py b/vllm_omni/config/config_factory.py
index 3b3f0d506..c34d21c49 100644
--- a/vllm_omni/config/config_factory.py
+++ b/vllm_omni/config/config_factory.py
@@ -9,7 +9,7 @@ from dataclasses import asdict
 from pathlib import Path
 from typing import Any
 
-from transformers import PreTrainedConfig
+from transformers import PretrainedConfig
 from vllm.logger import init_logger
 from vllm.transformers_utils.config import get_config
 from vllm.transformers_utils.repo_utils import get_hf_file_to_dict
@@ -329,7 +329,7 @@ class StageConfigFactory:
         return build_stage_runtime_overrides(stage.stage_id, cli_overrides)
 
     @staticmethod
-    def resolve_pipeline_config(model_type: str, hf_config: PreTrainedConfig | None = None) -> PipelineConfig | None:
+    def resolve_pipeline_config(model_type: str, hf_config: PretrainedConfig | None = None) -> PipelineConfig | None:
         """Given a model type, resolve to the pipeline to be used. If the pipeline
         maps to a callable we resolve based on the HF config."""
         if model_type not in OMNI_PIPELINES:
diff --git a/vllm_omni/config/pipeline_registry.py b/vllm_omni/config/pipeline_registry.py
index dc5843a26..a3f7f6e16 100644
--- a/vllm_omni/config/pipeline_registry.py
+++ b/vllm_omni/config/pipeline_registry.py
@@ -27,7 +27,7 @@ from __future__ import annotations
 from collections.abc import Callable
 from typing import TypeAlias
 
-from transformers import PreTrainedConfig
+from transformers import PretrainedConfig
 from vllm.logger import init_logger
 
 from vllm_omni.config.stage_config import (
@@ -78,7 +78,7 @@ from vllm_omni.model_executor.models.voxtral_tts.pipeline import VOXTRAL_TTS_PIP
 
 logger = init_logger(__name__)
 
-PipelineResolverFunc: TypeAlias = Callable[[PreTrainedConfig | None], PipelineConfig | None]
+PipelineResolverFunc: TypeAlias = Callable[[PretrainedConfig | None], PipelineConfig | None]
 
 # --- Multi-stage omni pipelines (LLM-centric; audio / video I/O) ---
 OMNI_PIPELINES: dict[str, PipelineConfig | PipelineResolverFunc] = {