diff --git a/audformat/core/table.py b/audformat/core/table.py
index 92522507..eee40ded 100644
--- a/audformat/core/table.py
+++ b/audformat/core/table.py
@@ -1148,13 +1148,7 @@ def _pyarrow_table_to_dataframe(
             dataframe
 
         """
-        df = table.to_pandas(
-            deduplicate_objects=False,
-            types_mapper={
-                pa.string(): pd.StringDtype(),
-            }.get,  # we have to provide a callable, not a dict
-        )
-        # Adjust dtypes and set index
+        df = table.to_pandas(deduplicate_objects=False)
         df = self._pyarrow_convert_dtypes(df, convert_all=from_csv)
         index_columns = list(self._levels_and_dtypes.keys())
         df = self._set_index(df, index_columns)