diff --git a/gwinc/ifo/noises.py b/gwinc/ifo/noises.py
index 28fdecdedb972d388a142ad171bd86f4e7fd8ceb..9d15bd646136eb6f4e00cc4ac8f13013d0b93c6d 100644
--- a/gwinc/ifo/noises.py
+++ b/gwinc/ifo/noises.py
@@ -1,8 +1,6 @@
 from .. import nb
 from .. import noise
 
-import numpy as np
-
 class QuantumVacuum(nb.Noise):
     """Quantum Vacuum