diff --git a/statsforecast/arima.py b/statsforecast/arima.py
index 3c972ce6c..5da13597d 100644
--- a/statsforecast/arima.py
+++ b/statsforecast/arima.py
@@ -16,7 +16,7 @@
 import statsmodels.api as sm
 from numba import njit
 from scipy.optimize import minimize
-from scipy.stats import norm
+from scipy.stats import norm, boxcox
 
 from .utils import AirPassengers as ap
 
@@ -2465,4 +2465,4 @@ def predict_in_sample(self, level: Optional[Union[int, Tuple[int]]] = None):
         return fitted_values
 
     def summary(self):
-        return self.model_.summary()
\ No newline at end of file
+        return self.model_.summary()