diff --git a/13_convolutional_neural_networks.ipynb b/13_convolutional_neural_networks.ipynb
index 7cd118d..f45559b 100644
--- a/13_convolutional_neural_networks.ipynb
+++ b/13_convolutional_neural_networks.ipynb
@@ -260,7 +260,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 12,
    "metadata": {
     "collapsed": false
    },
@@ -282,7 +282,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 13,
    "metadata": {
     "collapsed": false
    },
@@ -306,14 +306,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 15,
+   "execution_count": 14,
    "metadata": {
     "collapsed": false
    },
    "outputs": [],
    "source": [
-    "from sklearn.datasets import load_sample_images\n",
-    "dataset = np.array(load_sample_images().images, dtype=np.float32)\n",
     "batch_size, height, width, channels = dataset.shape\n",
     "\n",
     "filters = np.zeros(shape=(7, 7, channels, 2), dtype=np.float32)\n",