diff --git a/hashable_df/__init__.py b/hashable_df/__init__.py
index 68f5df6..5953ab9 100644
--- a/hashable_df/__init__.py
+++ b/hashable_df/__init__.py
@@ -13,9 +13,9 @@ def f(value):
 
 def hashable_df(df):
     """Return a DataFrame with hashable cell values."""
-    # applymap might change types. Try to restore the original.
+    # map might change types. Try to restore the original.
     orig_types = df.dtypes
-    df = df.applymap(f).astype(orig_types, errors="ignore")
+    df = df.map(f).astype(orig_types, errors="ignore")
     return df