diff --git a/notebooks/tutorials/pandas-cookbook/07-cleaning-up-messy-data.ipynb b/notebooks/tutorials/pandas-cookbook/07-cleaning-up-messy-data.ipynb
index dab79f0c217..ca5ece7bcec 100644
--- a/notebooks/tutorials/pandas-cookbook/07-cleaning-up-messy-data.ipynb
+++ b/notebooks/tutorials/pandas-cookbook/07-cleaning-up-messy-data.ipynb
@@ -461,7 +461,7 @@
    "outputs": [],
    "source": [
     "na_values = [\"NO CLUE\", \"N/A\", \"0\"]\n",
-    "requests.replace(na_values, np.NaN)"
+    "requests.replace(na_values, np.nan)"
    ]
   },
   {