diff --git a/src/llamafactory/webui/chatter.py b/src/llamafactory/webui/chatter.py
index 9b1bcd67..feeeaf3d 100644
--- a/src/llamafactory/webui/chatter.py
+++ b/src/llamafactory/webui/chatter.py
@@ -114,6 +114,11 @@ class WebChatModel(ChatModel):
         elif self.demo_mode:
             error = ALERTS["err_demo"][lang]
 
+        try:
+            json.loads(get("infer.extra_args"))
+        except json.JSONDecodeError:
+            error = ALERTS["err_json_schema"][lang]
+
         if error:
             gr.Warning(error)
             yield error
@@ -131,9 +136,9 @@ class WebChatModel(ChatModel):
             enable_liger_kernel=(get("top.booster") == "liger_kernel"),
             infer_backend=get("infer.infer_backend"),
             infer_dtype=get("infer.infer_dtype"),
-            vllm_enforce_eager=True,
             trust_remote_code=True,
         )
+        args.update(json.loads(get("infer.extra_args")))
 
         # checkpoints
         if checkpoint_path:
diff --git a/src/llamafactory/webui/components/infer.py b/src/llamafactory/webui/components/infer.py
index 677036b9..ef508cdf 100644
--- a/src/llamafactory/webui/components/infer.py
+++ b/src/llamafactory/webui/components/infer.py
@@ -36,6 +36,7 @@ def create_infer_tab(engine: "Engine") -> dict[str, "Component"]:
     with gr.Row():
         infer_backend = gr.Dropdown(choices=["huggingface", "vllm", "sglang"], value="huggingface")
         infer_dtype = gr.Dropdown(choices=["auto", "float16", "bfloat16", "float32"], value="auto")
+        extra_args = gr.Textbox(value='{"vllm_enforce_eager": true}')
 
     with gr.Row():
         load_btn = gr.Button()
@@ -43,11 +44,12 @@ def create_infer_tab(engine: "Engine") -> dict[str, "Component"]:
 
     info_box = gr.Textbox(show_label=False, interactive=False)
 
-    input_elems.update({infer_backend, infer_dtype})
+    input_elems.update({infer_backend, infer_dtype, extra_args})
     elem_dict.update(
         dict(
             infer_backend=infer_backend,
             infer_dtype=infer_dtype,
+            extra_args=extra_args,
             load_btn=load_btn,
             unload_btn=unload_btn,
             info_box=info_box,