diff --git a/cvx/markowitz/models/bounds.py b/cvx/markowitz/models/bounds.py
index 340a6730..3c156d92 100644
--- a/cvx/markowitz/models/bounds.py
+++ b/cvx/markowitz/models/bounds.py
@@ -8,7 +8,7 @@
 
 from cvx.markowitz.model import Model
 from cvx.markowitz.types import Expressions, Matrix, Variables
-from cvx.markowitz.utils.aux import fill_vector
+from cvx.markowitz.utils.fill import fill_vector
 
 
 @dataclass(frozen=True)
diff --git a/tests/test_markowitz/test_utils/test_aux.py b/tests/test_markowitz/test_utils/test_aux.py
index 85124fa5..9ca4b9c4 100644
--- a/tests/test_markowitz/test_utils/test_aux.py
+++ b/tests/test_markowitz/test_utils/test_aux.py
@@ -1,6 +1,6 @@
 import numpy as np
 
-from cvx.markowitz.utils.aux import fill_matrix, fill_vector
+from cvx.markowitz.utils.fill import fill_matrix, fill_vector
 
 
 def test_fill_vector():