diff --git a/arcface/README.md b/arcface/README.md
index abc608a5..92eb9d7c 100644
--- a/arcface/README.md
+++ b/arcface/README.md
@@ -8,7 +8,7 @@
 
 ## 2.Export ONNX Model
 ```
-python3 export_onnx.py --input_shape 4 3 112 112
+python3 export_onnx.py --input_shape 1 3 112 112
 ```
 
 ## 3.Build arcface_trt Project