diff --git a/ml2/3_2_Pandas.ipynb b/ml2/3_2_Pandas.ipynb
index bcb5be6..6f7e34a 100644
--- a/ml2/3_2_Pandas.ipynb
+++ b/ml2/3_2_Pandas.ipynb
@@ -150,7 +150,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Series with population in 2015 of more populated cities in Spain\n",
+    "# Series with population in 2015 of most populous cities in Spain\n",
     "s = Series([3141991, 1604555, 786189, 693878, 664953, 569130], index=['Madrid', 'Barcelona', 'Valencia', 'Sevilla', \n",
     "                                                                      'Zaragoza', 'Malaga'])\n",
     "s"
@@ -177,7 +177,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Until now, we have not seen any advantage in using Panda Series. we are going to show now some examples of their possibilities."
+    "Until now, we have not seen any advantage in using Panda Series. We are going to show some examples of their possibilities."
    ]
   },
   {
@@ -204,7 +204,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Observe that (s > 1000000) returns a Series object. We can use this boolean vector as a filter to get a *slice* of the original series that contains only the elements where the value of the filter is True. The original Series s is not modified. This selection is called *boolean indexing*."
+    "Observe that (s > 1000000) returns a Series object. We can use this Boolean vector as a filter to obtain a slice of the original series containing only the elements where the filter evaluates to True. The original Series s is not modified. This selection is called *boolean indexing*."
    ]
   },
   {
@@ -323,7 +323,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We can also change values directly or based on a condition. You can consult additional feautures in the manual."
+    "We can also change values directly or based on a condition. You can consult additional features in the manual."
    ]
   },
   {
@@ -344,7 +344,8 @@
    "outputs": [],
    "source": [
     "# Increase by 10% cities with population greater than 700000\n",
-    "s[s > 700000] = 1.1 * s[s > 700000]\n",
+    "# Since pandas 3.X use where\n",
+    "s = s.where(s <= 700000, s * 1.1)\n",
     "s"
    ]
   },
@@ -449,7 +450,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The notebook is freely licensed under under the [Creative Commons Attribution Share-Alike license](https://creativecommons.org/licenses/by/2.0/).  \n",
+    "The notebook is freely licensed under the [Creative Commons Attribution Share-Alike license](https://creativecommons.org/licenses/by/2.0/).  \n",
     "\n",
     "©  Carlos A. Iglesias, Universidad Politécnica de Madrid."
    ]