diff --git a/borgweb/borg/urls.py b/borgweb/borg/urls.py
index 60d3752..c5c6693 100644
--- a/borgweb/borg/urls.py
+++ b/borgweb/borg/urls.py
@@ -8,7 +8,7 @@ urlpatterns = [
     path('repo_daily.json', cache_page(3600)(views.repo_daily_json), name='daily repo json'),
     path('repo_monthly.json', cache_page(3600 * 12)(views.repo_monthly_json), name='monthly repo json'),
     path('repo_list.json', cache_page(60)(views.repo_list_json), name='repo list'),
-    path('repo/<str:repo_label>/size.json', cache_page(60)(views.repo_size_json), name='repo size time series'),
+    path('repo/<str:repo_label>/size.json', cache_page(3600)(views.repo_size_json), name='repo size time series'),
     path('repo/<str:repo_label>.json', cache_page(60)(views.repo_json), name='repo json'),
     path('repo/<str:repo_label>', cache_page(60)(views.repo), name='repo'),
     path('post/repo', views.post_repo, name='post repo'),