diff --git a/tools/minimax_tools/minimax_to_fortran_source.py b/tools/minimax_tools/minimax_to_fortran_source.py
index c744ef8f36..3f07c12c60 100755
--- a/tools/minimax_tools/minimax_to_fortran_source.py
+++ b/tools/minimax_tools/minimax_to_fortran_source.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import re
 import argparse
diff --git a/tools/precommit/precommit.py b/tools/precommit/precommit.py
index 8acf3ba6e2..9c339b7fa6 100755
--- a/tools/precommit/precommit.py
+++ b/tools/precommit/precommit.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # author: Ole Schuett
 
diff --git a/tools/precommit/precommit_server.py b/tools/precommit/precommit_server.py
index 720280d268..e68f739242 100755
--- a/tools/precommit/precommit_server.py
+++ b/tools/precommit/precommit_server.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # author: Ole Schuett
 
diff --git a/tools/regtesting/do_regtest.py b/tools/regtesting/do_regtest.py
index aa32f8724d..0ba4f386e4 100755
--- a/tools/regtesting/do_regtest.py
+++ b/tools/regtesting/do_regtest.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # author: Ole Schuett
 
diff --git a/tools/regtesting/optimize_test_dirs.py b/tools/regtesting/optimize_test_dirs.py
index c444033230..cd594b4565 100755
--- a/tools/regtesting/optimize_test_dirs.py
+++ b/tools/regtesting/optimize_test_dirs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 # author: Ole Schuett