diff --git a/src/agenda_culturel/import_tasks/extractor_ical.py b/src/agenda_culturel/import_tasks/extractor_ical.py
index 1eedd18..9b43716 100644
--- a/src/agenda_culturel/import_tasks/extractor_ical.py
+++ b/src/agenda_culturel/import_tasks/extractor_ical.py
@@ -91,7 +91,7 @@ class ICALExtractor(Extractor):
                 end_day = end_day + timedelta(days=-1)
 
             location = self.get_item_from_vevent(event, "LOCATION")
-            if location.replace(" ", "") == "":
+            if (not location is None) and location.replace(" ", "") == "":
                 location = None
 
             description = self.get_item_from_vevent(event, "DESCRIPTION")
@@ -127,7 +127,7 @@ class ICALExtractor(Extractor):
                     )
                     # possible limitation: if the ordering is not original then related
 
-            tags = None
+            tags = []
 
             last_modified = self.get_item_from_vevent(event, "LAST-MODIFIED", raw=True)