diff --git a/ultron/followup/views.py b/ultron/followup/views.py
index fa8ec8ff5a..c347d09cae 100644
--- a/ultron/followup/views.py
+++ b/ultron/followup/views.py
@@ -38,6 +38,7 @@ from .forms import (
 )
 
 from ultron.tools.date_week_transition import (
+    is_valid_season,
     from_date_to_week_number,
     from_week_number_to_date,
 )
@@ -91,9 +92,7 @@ def average_jump_chrono_details_for_week_of_season(request, gymnast_id, routine_
     if week_number < 1:
         week_number = 1
 
-    pattern = "^[0-9]{4}-[0-9]{4}$"
-
-    if season is None:
+    if season is None or not is_valid_season(season):
         season = str(today.year) + "-" + str(today.year + 1)
 
     date_begin, date_end = from_week_number_to_date(season, week_number)