diff --git a/README.md b/README.md
index 78d9d2b..1a1742d 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ This operator uses Facebook's [Detectron2](https://github.com/facebookresearch/d
 ```python
 import towhee
 
-towhee.glob('./towhee.jpg') \
+towhee.glob('./example.jpg') \
       .image_decode() \
       .object_detection.detectron2(model_name='retinanet_resnet50') \
       .show()
diff --git a/__init__.py b/__init__.py
index 9bb167a..a635800 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,3 +1,5 @@
+from .detectron import Detectron2
+
 
 def detectron2(*args, **kwargs):
     return Detectron2(*args, **kwargs)
diff --git a/detectron2.py b/detectron.py
similarity index 100%
rename from detectron2.py
rename to detectron.py
diff --git a/requirements.txt b/requirements.txt
index 3b08d0f..f71aa98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 torch >= 1.8
 torchvision >= 0.9.0
-https://github.com/facebookresearch/detectron2/archive/refs/tags/v0.6.tar.gz
+detectron2
+# https://github.com/facebookresearch/detectron2/archive/refs/tags/v0.6.tar.gz