diff --git a/src/P2/preprocessing.py b/src/P2/preprocessing.py
index 21a83ea..e3871f5 100644
--- a/src/P2/preprocessing.py
+++ b/src/P2/preprocessing.py
@@ -1,4 +1,5 @@
 from pandas import DataFrame, read_csv
+from sklearn.preprocessing import normalize
 
 
 def replace_values(df) -> DataFrame:
@@ -37,7 +38,21 @@ def filter_dataframe(df) -> DataFrame:
     return filtered_df
 
 
+def normalize_numerical_values(df) -> DataFrame:
+    cols = [
+        "TOT_HERIDOS_LEVES",
+        "TOT_HERIDOS_GRAVES",
+        "TOT_VEHICULOS_IMPLICADOS",
+        "TOT_MUERTOS",
+    ]
+    filtered_df = df.filter(items=cols)
+    normalized_df = normalize(X=filtered_df)
+    updated_df = df.update(normalized_df)
+    return updated_df
+
+
 def parse_data(source, action) -> DataFrame:
     df = read_csv(filepath_or_buffer=source, na_values="?")
     processed_df = process_na(df=df, action=action)
-    return processed_df
+    normalized_df = normalize_numerical_values(df=processed_df)
+    return normalized_df