diff --git a/funnel/views/helpers.py b/funnel/views/helpers.py
index 76fee10c3..8344cc72d 100644
--- a/funnel/views/helpers.py
+++ b/funnel/views/helpers.py
@@ -28,7 +28,7 @@
     url_for,
 )
 from furl import furl
-from pytz import common_timezones, timezone as pytz_timezone, utc
+from pytz import all_timezones, timezone as pytz_timezone, utc
 from werkzeug.exceptions import MethodNotAllowed, NotFound
 from werkzeug.routing import BuildError, RequestRedirect
 
@@ -42,7 +42,7 @@
 from ..proxies import request_wants
 from ..typing import ResponseType, ReturnResponse, ReturnView
 
-valid_timezones = set(common_timezones)
+valid_timezones = set(all_timezones)
 
 nocache_expires = utc.localize(datetime(1990, 1, 1))