diff --git a/app.py b/app.py
index 1d0c600..f513e59 100644
--- a/app.py
+++ b/app.py
@@ -1434,7 +1434,8 @@ def main_page():
         archived_lists=archived_lists,
         now=now,
         timedelta=timedelta,
-        month_options=month_options
+        month_options=month_options,
+        selected_month=month_str
     )
 
 
diff --git a/templates/main.html b/templates/main.html
index b1dc50c..fc09631 100644
--- a/templates/main.html
+++ b/templates/main.html
@@ -33,7 +33,6 @@
 
 {% set month_names = ["styczeń", "luty", "marzec", "kwiecień", "maj", "czerwiec", "lipiec", "sierpień", "wrzesień",
 "październik", "listopad", "grudzień"] %}
-{% set selected_month = selected_month or now.strftime('%Y-%m') %}
 
 <!-- Pulpit: zwykły <select> -->
 <div class="d-none d-md-flex justify-content-end align-items-center flex-wrap gap-2 mb-3">