diff --git a/.gitlab-scripts/generate-ci.py b/.gitlab-scripts/generate-ci.py
index 7b0ac78d73..e31d8d70fc 100755
--- a/.gitlab-scripts/generate-ci.py
+++ b/.gitlab-scripts/generate-ci.py
@@ -1,4 +1,4 @@
-#!/bin/env python
+#!/bin/env python3
 import glob
 import os
 import sys
diff --git a/.hooks/link_modules b/.hooks/link_modules
index c7c469f1ae..4d68d697ea 100755
--- a/.hooks/link_modules
+++ b/.hooks/link_modules
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
diff --git a/.hooks/update_requirements b/.hooks/update_requirements
index 615832c768..03c552e764 100755
--- a/.hooks/update_requirements
+++ b/.hooks/update_requirements
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
diff --git a/modules/country/scripts/import_postal_codes.py b/modules/country/scripts/import_postal_codes.py
index 87529eefdd..edbb64aa48 100755
--- a/modules/country/scripts/import_postal_codes.py
+++ b/modules/country/scripts/import_postal_codes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # PYTHON_ARGCOMPLETE_OK
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
diff --git a/modules/purchase_shipment_cost/tests/test_module.py b/modules/purchase_shipment_cost/tests/test_module.py
index e10fc0c064..18bb515ae4 100644
--- a/modules/purchase_shipment_cost/tests/test_module.py
+++ b/modules/purchase_shipment_cost/tests/test_module.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.