diff --git a/contrib/machine-learning/index.md b/contrib/machine-learning/index.md
index edb0860..ce42538 100644
--- a/contrib/machine-learning/index.md
+++ b/contrib/machine-learning/index.md
@@ -7,4 +7,4 @@
 - [Support Vector Machine Algorithm](support-vector-machine.md)
 - [Artificial Neural Network from the Ground Up](ArtificialNeuralNetwork.md)
 - [TensorFlow.md](tensorFlow.md)
-- [PyTorch.md](PyTorch.md)
+- [PyTorch.md](pytorch.md)