diff --git a/doc-publik/update-publik-doc-from-redmine.py b/doc-publik/update-publik-doc-from-redmine.py
index 19ee890..0474453 100644
--- a/doc-publik/update-publik-doc-from-redmine.py
+++ b/doc-publik/update-publik-doc-from-redmine.py
@@ -12,9 +12,7 @@ DOCS = {
     'redmine-contribuer-a-publik': "https://dev.entrouvert.org/projects/publik/wiki/Contribuer_%C3%A0_Publik.html",
 }
 
-for cell in TextCell.objects.all():
-    if not cell.slug in DOCS:
-        continue
+for cell in TextCell.objects.filter(slug__in=DOCS.keys(), page__snapshot__isnull=True):
     resp = requests.get(DOCS[cell.slug])
     if resp.status_code != 200:
         continue