diff --git a/ml1/2_3_1_Advanced_Visualisation.ipynb b/ml1/2_3_1_Advanced_Visualisation.ipynb
index 50776e1..bedaf67 100644
--- a/ml1/2_3_1_Advanced_Visualisation.ipynb
+++ b/ml1/2_3_1_Advanced_Visualisation.ipynb
@@ -52,7 +52,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    In the previous notebook, we developed plots with the [matplotlib](http://matplotlib.org/) plotting library.\n",
+    "In the previous notebook, we developed plots with the [matplotlib](http://matplotlib.org/) plotting library.\n",
     "\n",
     "This notebook introduces another plotting library, [**seaborn**](https://stanford.edu/~mwaskom/software/seaborn/),  which provides advanced facilities for data visualization.\n",
     "\n",