diff --git a/propel_loss/propel.py b/propel_loss/propel.py
index 9f12e3b..89568e1 100644
--- a/propel_loss/propel.py
+++ b/propel_loss/propel.py
@@ -2,8 +2,6 @@
 import itertools
 
 import torch
-import numpy as np
-
 
 # Define EPS for numerical stability
 eps = 7.0/3 - 4.0/3 - 1