diff --git a/seglearn/transform.py b/seglearn/transform.py
index 5e3ec6b..585f0ea 100644
--- a/seglearn/transform.py
+++ b/seglearn/transform.py
@@ -8,7 +8,7 @@
 from scipy.interpolate import interp1d
 from sklearn.base import BaseEstimator, TransformerMixin
 from sklearn.utils import check_random_state, check_array, check_consistent_length, shuffle
-from sklearn.utils.fixes import signature
+from inspect import signature
 from sklearn.exceptions import NotFittedError
 from sklearn.utils import check_random_state, check_array, check_consistent_length
 from sklearn.utils.metaestimators import _BaseComposition