diff --git a/Chapter_1.ipynb b/Chapter_1.ipynb
index db6646a..00497d1 100644
--- a/Chapter_1.ipynb
+++ b/Chapter_1.ipynb
@@ -793,7 +793,7 @@
     "from sklearn.datasets import fetch_openml\n",
     "\n",
     "# Load data from https://www.openml.org/d/554\n",
-    "X, y = fetch_openml('mnist_784', version=1, return_X_y=True)\n",
+    "X, y = fetch_openml('mnist_784', version=1, return_X_y=True, as_frame=False)\n",
     "print(X.shape)"
    ]
   },