diff --git a/README.md b/README.md
index 37b4011f..367c5022 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ To install the required python packages simply type
 ```
 pip3 install -r requirements.txt
 ```
-Additionaly, to use ``demo.pynb``, you will also need [coco python api](https://github.com/cocodataset/cocoapi). You can get this using
+Additionaly, to use ``demo.ipynb``, you will also need [coco python api](https://github.com/cocodataset/cocoapi). You can get this using
 ```
 pip3 install git+https://github.com/philferriere/cocoapi.git
 ```