diff --git a/python/README.md b/python/README.md
index 5f109e853..a1e640c6e 100644
--- a/python/README.md
+++ b/python/README.md
@@ -70,7 +70,7 @@ mat = ncnn.Mat(mat_np)
 # Model Zoo
 install requirements
 ```bash
-pip install -U requirements.txt
+pip install -r requirements.txt
 ```
 then you can import ncnn.model_zoo and get model list as follow:
 ```bash
@@ -83,4 +83,4 @@ all model in model zoo has example in ncnn/python/examples folder
 
 # Custom Layer
 
-custom layer demo is in ncnn/python/ncnn/model_zoo/yolov5.py:23
\ No newline at end of file
+custom layer demo is in ncnn/python/ncnn/model_zoo/yolov5.py:23
diff --git a/python/ncnn/model_zoo/model_store.py b/python/ncnn/model_zoo/model_store.py
index af378d33b..1ce4b040d 100644
--- a/python/ncnn/model_zoo/model_store.py
+++ b/python/ncnn/model_zoo/model_store.py
@@ -64,7 +64,7 @@ _model_sha1 = {
     ]
 }
 
-github_repo_url = "https://github.com/caishanli/pyncnn-assets/raw/master/models/"
+github_repo_url = "https://github.com/nihui/ncnn-assets/raw/master/models/"
 _url_format = "{repo_url}{file_name}"