diff --git a/bda/views.py b/bda/views.py
index 4ea0df32..4cf3dd03 100644
--- a/bda/views.py
+++ b/bda/views.py
@@ -66,7 +66,7 @@ def etat_places(request, tirage_id):
 
 
 def _hash_queryset(queryset):
-    data = serializers.serialize("json", queryset).encode()
+    data = serializers.serialize("json", queryset).encode('utf-8')
     hasher = hashlib.sha256()
     hasher.update(data)
     return hasher.hexdigest()