diff --git a/periodicity.sage b/periodicity.sage
index 52f3f25..992d29d 100644
--- a/periodicity.sage
+++ b/periodicity.sage
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 # Copyright (c) 2018: Maria Marchwicka, Wojciech Politarczyk.
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,14 +13,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 
-
 import sys
 import os
 import numpy as np
 import warnings
 
 
-
 class MySettings(object):
 
     def __init__(self):
diff --git a/verbose_periodicity.sage b/verbose_periodicity.sage
index 154eea0..8df2e86 100644
--- a/verbose_periodicity.sage
+++ b/verbose_periodicity.sage
@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 # Copyright (c) 2018: Maria Marchwicka, Wojciech Politarczyk.
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,14 +13,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 
-
 import sys
 import os
 import numpy as np
 import warnings
 
 
-
 class MySettings(object):
 
     def __init__(self):