diff -up WeasyPrint-0.39/setup.py.shebang WeasyPrint-0.39/setup.py
--- WeasyPrint-0.39/setup.py.shebang	2017-06-24 06:17:13.000000000 -0600
+++ WeasyPrint-0.39/setup.py	2019-04-30 11:35:39.332841176 -0600
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python33
 # coding: utf-8
 
 """
diff -up WeasyPrint-0.39/weasyprint.py.shebang WeasyPrint-0.39/weasyprint.py
--- WeasyPrint-0.39/weasyprint.py.shebang	2019-04-30 11:37:57.246833547 -0600
+++ WeasyPrint-0.39/weasyprint.py	2019-04-30 11:38:06.906833013 -0600
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 from weasyprint.__main__ import main
 
 if __name__ == '__main__':
diff -up WeasyPrint-0.39/weasyprint/tests/test_web/run.py.shebang WeasyPrint-0.39/weasyprint/tests/test_web/run.py
--- WeasyPrint-0.39/weasyprint/tests/test_web/run.py.shebang	2019-04-30 11:38:19.879832296 -0600
+++ WeasyPrint-0.39/weasyprint/tests/test_web/run.py	2019-04-30 11:38:28.852831799 -0600
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # coding: utf-8
 """
     weasyprint.tests.test_web.run