diff --git a/colossalai/booster/plugin/gemini_plugin.py b/colossalai/booster/plugin/gemini_plugin.py
index b1f8ea24a..aeef14487 100644
--- a/colossalai/booster/plugin/gemini_plugin.py
+++ b/colossalai/booster/plugin/gemini_plugin.py
@@ -329,7 +329,7 @@ class GeminiPlugin(DPPluginBase):
         chunk_init_device: Optional[torch.device] = None,
         placement_policy: str = "static",
         enable_gradient_accumulation: bool = False,
-        max_prefetch:int = 0,
+        max_prefetch: int = 0,
         shard_param_frac: float = 1.0,  # only for static placement
         offload_optim_frac: float = 0.0,  # only for static placement
         offload_param_frac: float = 0.0,  # only for static placement