diff --git a/tools/simple_http_server.py b/tools/simple_http_server.py
index 24c55962d..f60686839 100755
--- a/tools/simple_http_server.py
+++ b/tools/simple_http_server.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """A version of Python's SimpleHTTPServer that flushes its output."""
 import sys