diff --git a/README.md b/README.md
index f5c98c0..31056c5 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ python get_training_data.py
 neural_network.py implemented NeuralNetwork  class and related functionality. 
 Run example:
 ```
-python neural_network.py train-images/ 30 0.1 300 10 60
+python3 neural_network.py train-images/ 30 0.1 300 10 60
 ```
 Inputs:
  - [data folder] folder with training data (in .gz format)
@@ -23,4 +23,4 @@ Inputs:
  - [learn rate]
  - [hidden size] the number of neurons in the hidden layer
  - [output size] the number of neurons in the output layer
- - [batch_size]
\ No newline at end of file
+ - [batch_size]