diff --git a/bindings/python/setup.py b/bindings/python/setup.py
index d986f0c6..6308b9f9 100644
--- a/bindings/python/setup.py
+++ b/bindings/python/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 This file is part of notmuch.
diff --git a/test/json_check_nodes.py b/test/json_check_nodes.py
index 17403c57..fd8f1607 100755
--- a/test/json_check_nodes.py
+++ b/test/json_check_nodes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import re
 import sys
 import json