diff --git a/geomagio/algorithm/SqDistAlgorithm.py b/geomagio/algorithm/SqDistAlgorithm.py
index c930b118e3dae69c43257c9d640155041f11b79e..afeb5618ee1f8aced71c0a3df1fc9e20e6479414 100644
--- a/geomagio/algorithm/SqDistAlgorithm.py
+++ b/geomagio/algorithm/SqDistAlgorithm.py
@@ -18,7 +18,6 @@ from .Algorithm import Algorithm
 from .AlgorithmException import AlgorithmException
 import json
 import numpy as np
-import sys
 from obspy.core import Stream, UTCDateTime
 from scipy.optimize import fmin_l_bfgs_b