diff --git a/scripts/extract.py b/scripts/extract.py
old mode 100644
new mode 100755
index 17c55407..deadb2a9
--- a/scripts/extract.py
+++ b/scripts/extract.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2020-2021 The reone project contributors
 
 # This program is free software: you can redistribute it and/or modify