diff --git a/libs/astradb/langchain_astradb/vectorstores.py b/libs/astradb/langchain_astradb/vectorstores.py
index 61d137b..b09f1e1 100644
--- a/libs/astradb/langchain_astradb/vectorstores.py
+++ b/libs/astradb/langchain_astradb/vectorstores.py
@@ -840,7 +840,7 @@ def delete_by_metadata_filter(
             filter: Filter on the metadata to apply. The filter cannot be empty.
 
         Returns:
-            An number expressing the amount of deleted documents.
+            A number expressing the amount of deleted documents.
         """
         if not filter:
             msg = (
@@ -869,7 +869,7 @@ async def adelete_by_metadata_filter(
             filter: Filter on the metadata to apply. The filter cannot be empty.
 
         Returns:
-            An number expressing the amount of deleted documents.
+            A number expressing the amount of deleted documents.
         """
         if not filter:
             msg = (