diff --git a/sabnzbd/utils/checkdir.py b/sabnzbd/utils/checkdir.py
index 4d2500f..0ba5c11 100644
--- a/sabnzbd/utils/checkdir.py
+++ b/sabnzbd/utils/checkdir.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 """
 Functions to check if the path filesystem uses FAT
diff --git a/sabnzbd/utils/diskspeed.py b/sabnzbd/utils/diskspeed.py
index 66458cd..9d7710b 100644
--- a/sabnzbd/utils/diskspeed.py
+++ b/sabnzbd/utils/diskspeed.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 import time
 import os
diff --git a/sabnzbd/utils/internetspeed.py b/sabnzbd/utils/internetspeed.py
index 0200ad9..5058c90 100755
--- a/sabnzbd/utils/internetspeed.py
+++ b/sabnzbd/utils/internetspeed.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3
 
 """
 Module to measure and report Internet speed
diff --git a/sabnzbd/utils/systrayiconthread.py b/sabnzbd/utils/systrayiconthread.py
index 8b275b8..3f593d7 100644
--- a/sabnzbd/utils/systrayiconthread.py
+++ b/sabnzbd/utils/systrayiconthread.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # based on SysTrayIcon.py by Simon Brunning - simon@brunningonline.net
 # http://www.brunningonline.net/simon/blog/archives/001835.html
 # http://www.brunningonline.net/simon/blog/archives/SysTrayIcon.py.html
diff --git a/scripts/Sample-PostProc.py b/scripts/Sample-PostProc.py
index a0778ca..b593b6a 100755
--- a/scripts/Sample-PostProc.py
+++ b/scripts/Sample-PostProc.py
@@ -1,10 +1,10 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # Example Post-Processing Script for SABnzbd (3.0.0 and higher), written in Python.
 # For Linux, MacOS, Windows and any other platform with Python
 # See https://sabnzbd.org/wiki/scripts/post-processing-scripts for details
 #
 # Example test run on Linux:
-# env SAB_VERSION=X.Y SAB_AVG_BPS=666 python ./Sample-PostProc.py somedir222 nzbname CleanJobName123 Index12 Cat88 MyGroup PP0 https://example.com/
+# env SAB_VERSION=X.Y SAB_AVG_BPS=666 python3 ./Sample-PostProc.py somedir222 nzbname CleanJobName123 Index12 Cat88 MyGroup PP0 https://example.com/
 
 import sys, os