diff --git a/server.py b/server.py
index 43cd062..c8cb0d3 100644
--- a/server.py
+++ b/server.py
@@ -229,6 +229,9 @@ def update_model_parameters(state, initial=False):
         elif element == 'cpu_memory' and value is not None:
             value = f"{value}MiB"
 
+        if element in ['pre_layer']:
+            value = [value] if value > 0 else None
+
         setattr(shared.args, element, value)
 
     found_positive = False
@@ -360,7 +363,7 @@ def create_model_menus():
 
                     with gr.Column():
                         shared.gradio['model_type'] = gr.Dropdown(label="model_type", choices=["None", "llama", "opt", "gptj"], value=shared.args.model_type or "None")
-                        shared.gradio['pre_layer'] = gr.Slider(label="pre_layer", minimum=0, maximum=100, value=shared.args.pre_layer)
+                        shared.gradio['pre_layer'] = gr.Slider(label="pre_layer", minimum=0, maximum=100, value=shared.args.pre_layer[0] if shared.args.pre_layer is not None else 0)
 
     with gr.Row():
         with gr.Column():