diff --git a/examples/notebooks/beam-ml/dataframe_api_preprocessing.ipynb b/examples/notebooks/beam-ml/dataframe_api_preprocessing.ipynb
index b77a63569820..645d62d32be3 100644
--- a/examples/notebooks/beam-ml/dataframe_api_preprocessing.ipynb
+++ b/examples/notebooks/beam-ml/dataframe_api_preprocessing.ipynb
@@ -1535,7 +1535,7 @@
         "numerical_cols = beam_df.select_dtypes(include=np.number).columns.tolist()\n",
         "categorical_cols = list(set(beam_df.columns) - set(numerical_cols))"
       ]
-    }
+    },
     {
       "cell_type": "code",
       "execution_count": null,
@@ -3492,4 +3492,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 0
-}
\ No newline at end of file
+}