diff --git a/amodem/calib.py b/amodem/calib.py
index 6d9b4cf..384f961 100644
--- a/amodem/calib.py
+++ b/amodem/calib.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import sys
 import numpy as np
 
diff --git a/amodem/recv.py b/amodem/recv.py
index 3dbeecd..0f1e799 100644
--- a/amodem/recv.py
+++ b/amodem/recv.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import numpy as np
 import logging
 import itertools
diff --git a/amodem/send.py b/amodem/send.py
index d2bd607..eb66f0e 100644
--- a/amodem/send.py
+++ b/amodem/send.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import numpy as np
 import logging
 import itertools
diff --git a/amodem/wave.py b/amodem/wave.py
index bbc9744..7bb4b3a 100644
--- a/amodem/wave.py
+++ b/amodem/wave.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 import os
 import signal
 import subprocess as sp