diff --git a/lessons/3-NeuralNetworks/03-Perceptron/Perceptron.ipynb b/lessons/3-NeuralNetworks/03-Perceptron/Perceptron.ipynb
index 2928fa0a..e74eb6ba 100644
--- a/lessons/3-NeuralNetworks/03-Perceptron/Perceptron.ipynb
+++ b/lessons/3-NeuralNetworks/03-Perceptron/Perceptron.ipynb
@@ -638,7 +638,7 @@
     "# In this case correct the link to the dataset below as well.\n",
     "\n",
     "with gzip.open('../../data/mnist.pkl.gz', 'rb') as mnist_pickle:\n",
-    "    MNIST = pickle.load(mnist_pickle)"
+    "    MNIST = pickle.load(mnist_pickle, encoding='latin1')"
    ]
   },
   {