diff --git a/htmlreport/cppcheck-htmlreport b/htmlreport/cppcheck-htmlreport
index 5c0a78adfa4..ce5956c1e1b 100755
--- a/htmlreport/cppcheck-htmlreport
+++ b/htmlreport/cppcheck-htmlreport
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/htmlreport/setup.py b/htmlreport/setup.py
index e741ece55d8..ac790fbebc1 100755
--- a/htmlreport/setup.py
+++ b/htmlreport/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from setuptools import setup
 
diff --git a/htmlreport/test_htmlreport.py b/htmlreport/test_htmlreport.py
index ffca77f298e..4fd6cf6c256 100755
--- a/htmlreport/test_htmlreport.py
+++ b/htmlreport/test_htmlreport.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """Test cppcheck-htmlreport."""
 
 import os
diff --git a/test/synthetic/report.py b/test/synthetic/report.py
index e4d972102e9..17f58239f9e 100755
--- a/test/synthetic/report.py
+++ b/test/synthetic/report.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os
 import re
 
diff --git a/tools/ci.py b/tools/ci.py
index 6d2b8cfc471..27d0f871874 100644
--- a/tools/ci.py
+++ b/tools/ci.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # continuous integration
 # build daily reports (doxygen,coverage,etc)
diff --git a/tools/extracttests.py b/tools/extracttests.py
index 2771314656e..42a80d6c051 100755
--- a/tools/extracttests.py
+++ b/tools/extracttests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Cppcheck - A tool for static C/C++ code analysis
 # Copyright (C) 2007-2021 Cppcheck team.
diff --git a/tools/listErrorsWithoutCWE.py b/tools/listErrorsWithoutCWE.py
index 1a4c784c473..0a78ff5bd36 100755
--- a/tools/listErrorsWithoutCWE.py
+++ b/tools/listErrorsWithoutCWE.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import print_function
 import argparse
 import xml.etree.ElementTree as ET
diff --git a/tools/matchcompiler.py b/tools/matchcompiler.py
index b195f3816b4..2544366965a 100755
--- a/tools/matchcompiler.py
+++ b/tools/matchcompiler.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Cppcheck - A tool for static C/C++ code analysis
 # Copyright (C) 2007-2021 Cppcheck team.
diff --git a/tools/parse-glibc.py b/tools/parse-glibc.py
index cb79edec812..6120e68ca0a 100644
--- a/tools/parse-glibc.py
+++ b/tools/parse-glibc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import glob
 import os
diff --git a/tools/reduce.py b/tools/reduce.py
index ae4507e616d..595aaff18c8 100755
--- a/tools/reduce.py
+++ b/tools/reduce.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import subprocess
 import sys
 import time
diff --git a/tools/test_matchcompiler.py b/tools/test_matchcompiler.py
index 82327fb8622..104601df7e3 100755
--- a/tools/test_matchcompiler.py
+++ b/tools/test_matchcompiler.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Cppcheck - A tool for static C/C++ code analysis
 # Copyright (C) 2007-2021 Cppcheck team.