diff --git a/visualizer.py b/visualizer.py
old mode 100755
new mode 100644
index cb8e1432da82bd617aa63d79e3c64b35028bbf74..b0352130f983db1fe637ded82b81c0da51d500ef
--- a/visualizer.py
+++ b/visualizer.py
@@ -1,12 +1,9 @@
-#!/usr/bin/env python3
-
 import datetime
 from io import BytesIO
 import json
 import math
 from types import SimpleNamespace
 from urllib.request import urlopen
-from wsgiref.handlers import CGIHandler
 
 # Activate the virtual env to get access to non-standard packages.
 activator = 'venv/bin/activate_this.py'
@@ -380,4 +377,4 @@ def read_data(station, year):
 
 
 if __name__ == '__main__':
-    CGIHandler().run(app)
+    app.run()