diff --git a/Tests/32bit_segfault_check.py b/Tests/32bit_segfault_check.py
index 26a91d5cd..e19cdf7a9 100755
--- a/Tests/32bit_segfault_check.py
+++ b/Tests/32bit_segfault_check.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 
diff --git a/Tests/check_fli_oob.py b/Tests/check_fli_oob.py
index 739ad224e..6b63a6826 100644
--- a/Tests/check_fli_oob.py
+++ b/Tests/check_fli_oob.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from PIL import Image
 
diff --git a/Tests/check_imaging_leaks.py b/Tests/check_imaging_leaks.py
index 407f3ea80..d07082aba 100755
--- a/Tests/check_imaging_leaks.py
+++ b/Tests/check_imaging_leaks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import pytest
 
 from PIL import Image
diff --git a/Tests/check_jp2_overflow.py b/Tests/check_jp2_overflow.py
index a7a343c98..f81a360ce 100755
--- a/Tests/check_jp2_overflow.py
+++ b/Tests/check_jp2_overflow.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Reproductions/tests for OOB read errors in FliDecode.c
 
diff --git a/Tests/createfontdatachunk.py b/Tests/createfontdatachunk.py
index 011bb0bed..e318eb732 100755
--- a/Tests/createfontdatachunk.py
+++ b/Tests/createfontdatachunk.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import base64
 import os
 
diff --git a/docs/Guardfile b/docs/Guardfile
index 16f731611..b689b079a 100755
--- a/docs/Guardfile
+++ b/docs/Guardfile
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from livereload.compiler import shell
 from livereload.task import Task
 
diff --git a/selftest.py b/selftest.py
index 7e08d183b..8d77cc5a9 100755
--- a/selftest.py
+++ b/selftest.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # minimal sanity check
 
 import sys
diff --git a/setup.py b/setup.py
index 52babbc6b..c3b9eee41 100755
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # > pyroma .
 # ------------------------------
 # Checking .