diff --git a/09_tabular.ipynb b/09_tabular.ipynb
index 34e4b26..644812b 100644
--- a/09_tabular.ipynb
+++ b/09_tabular.ipynb
@@ -8596,7 +8596,7 @@
     }
    ],
    "source": [
-    "p = valid_xs_final['ProductSize'].value_counts(sort=False).plot.barh()\n",
+    "p = valid_xs_final['ProductSize'].value_counts(sort=False).sort_index().plot.barh()\n",
     "c = to.classes['ProductSize']\n",
     "plt.yticks(range(len(c)), c);"
    ]
diff --git a/clean/09_tabular.ipynb b/clean/09_tabular.ipynb
index 04b952a..78d6cd3 100644
--- a/clean/09_tabular.ipynb
+++ b/clean/09_tabular.ipynb
@@ -866,7 +866,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "p = valid_xs_final['ProductSize'].value_counts(sort=False).plot.barh()\n",
+    "p = valid_xs_final['ProductSize'].value_counts(sort=False).sort_index().plot.barh()\n",
     "c = to.classes['ProductSize']\n",
     "plt.yticks(range(len(c)), c);"
    ]