diff --git a/src/panel/historic_vol.rs b/src/panel/historic_vol.rs
index e8c427d..45d5f68 100644
--- a/src/panel/historic_vol.rs
+++ b/src/panel/historic_vol.rs
@@ -1,6 +1,6 @@
 use crate::utils::dateutils::{get_bdates_from_col, get_min_max_real_dates};
 use crate::utils::qdf::pivots::*;
-use crate::utils::qdf::reduce_df::*;
+use crate::utils::qdf::reduce_dataframe;
 use chrono::NaiveDate;
 use ndarray::{s, Array, Array1, Zip};
 use polars::prelude::*;