diff --git a/support/printable.py b/support/printable.py
index c42850d2..7ba37f56 100755
--- a/support/printable.py
+++ b/support/printable.py
@@ -1,7 +1,8 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This script uses the following Unicode tables:
 # - UnicodeData.txt
+# Script license: https://github.com/rust-lang/rust/blob/master/LICENSE-MIT
 
 
 from collections import namedtuple