diff --git a/src/taskflower/web/invite/__init__.py b/src/taskflower/web/invite/__init__.py
index 790bdf4..58add30 100644
--- a/src/taskflower/web/invite/__init__.py
+++ b/src/taskflower/web/invite/__init__.py
@@ -20,7 +20,7 @@ from taskflower.sanitize.code import SignUpCodeForUser, ZoneInviteCodeForUser
 from taskflower.types import assert_usr
 from taskflower.types.either import Either, Left, Right, gather_successes
 from taskflower.types.option import Option
-from taskflower.util.time import now
+from taskflower.util.time import ensure_timezone_aware, now
 from taskflower.web.errors import ResponseErrorBadRequest, ResponseErrorForbidden, ResponseErrorNotFound, response_from_exception
 from taskflower.web.utils.request import get_next
 
@@ -241,7 +241,7 @@ def enter():
 		)
 	).flat_map(
 		lambda code: Either.do_assert(
-			code.expires > now(),
+			ensure_timezone_aware(code.expires) > now(),
 			'Code expiration date is in the future'
 		).map(
 			lambda _: code