diff --git a/README.md b/README.md
index abaadfe3a899bae02a4e051545f3c73b542f3122..c2efb3d816ff2f7ebd3754b2c5b70b4d910cf722 100755
--- a/README.md
+++ b/README.md
@@ -102,7 +102,7 @@ which need to completed using only the `numpy` package and the `correlate` or `c
 
 ### 3. Complete cnn.py
 
-`cnnbp.py` includes the following subroutine
+`cnn.py` includes the following subroutine
 
 ```python
 def trainCNN(X, Y, **args):