diff --git a/firmware/makehex.py b/firmware/makehex.py
index 70282c2..419b378 100644
--- a/firmware/makehex.py
+++ b/firmware/makehex.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 #
 # This is free and unencumbered software released into the public domain.
 #
diff --git a/scripts/smt2-bmc/async.py b/scripts/smt2-bmc/async.py
index 7606440..6113714 100644
--- a/scripts/smt2-bmc/async.py
+++ b/scripts/smt2-bmc/async.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import os, sys, getopt
 from time import time
diff --git a/scripts/smt2-bmc/smtio.py b/scripts/smt2-bmc/smtio.py
index 1e37eb0..bdd8100 100644
--- a/scripts/smt2-bmc/smtio.py
+++ b/scripts/smt2-bmc/smtio.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import sys
 import subprocess
diff --git a/scripts/smt2-bmc/sync.py b/scripts/smt2-bmc/sync.py
index 6f35841..d46af3a 100644
--- a/scripts/smt2-bmc/sync.py
+++ b/scripts/smt2-bmc/sync.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import os, sys, getopt
 from time import time