diff --git a/src/mongo/mongo.py b/src/mongo/mongo.py
index 0ad458d..a980bf1 100644
--- a/src/mongo/mongo.py
+++ b/src/mongo/mongo.py
@@ -328,7 +328,7 @@ class MongoDB:
         """replace a whole document, optionally upserting"""
         try:
             response = await self._db[collection].replace_one(target, document, upsert=upsert)
-            return bool(response.matched_count or response.upserted_id)
+            return response.matched_count > 0 or response.upserted_id is not None
         except Exception:
             log.exception("db.update_document() on %s", collection)
             return False
@@ -382,7 +382,7 @@ class MongoDB:
             response = await self._db[collection].update_one(
                 target, {"$set": updates}, upsert=True
             )
-            return bool(response.matched_count or response.upserted_id)
+            return response.matched_count > 0 or response.upserted_id is not None
         except Exception:
             log.exception("db.upsert_document_field() on %s", collection)
             return False