diff --git a/apps/search_indexes/serializers.py b/apps/search_indexes/serializers.py
index 67a2bff0..7bd3995a 100644
--- a/apps/search_indexes/serializers.py
+++ b/apps/search_indexes/serializers.py
@@ -168,6 +168,7 @@ class ScheduleDocumentSerializer(serializers.Serializer):
     weekday = serializers.IntegerField()
     weekday_display = serializers.CharField()
     closed_at = serializers.CharField()
+    opening_at = serializers.CharField()
 
 
 class InFavoritesMixin(DocumentSerializer):