diff --git a/integrations/valkey/src/haystack_integrations/document_stores/valkey/document_store.py b/integrations/valkey/src/haystack_integrations/document_stores/valkey/document_store.py
index 6ff467458b..2292843fdb 100644
--- a/integrations/valkey/src/haystack_integrations/document_stores/valkey/document_store.py
+++ b/integrations/valkey/src/haystack_integrations/document_stores/valkey/document_store.py
@@ -734,7 +734,9 @@ def delete_documents(self, document_ids: list[str]) -> None:
         """
         client = self._get_connection()
 
-        keys: list[str | bytes] = [f"{self._index_name}:{doc_id}" for doc_id in document_ids]
+        keys: list[str | bytes | bytearray | memoryview[int]] = [
+            f"{self._index_name}:{doc_id}" for doc_id in document_ids
+        ]
         try:
             result = client.delete(keys)
             if result < len(document_ids):
@@ -770,7 +772,9 @@ async def delete_documents_async(self, document_ids: list[str]) -> None:
         """
         client = await self._get_connection_async()
 
-        keys: list[str | bytes] = [f"{self._index_name}:{doc_id}" for doc_id in document_ids]
+        keys: list[str | bytes | bytearray | memoryview[int]] = [
+            f"{self._index_name}:{doc_id}" for doc_id in document_ids
+        ]
         try:
             result = await client.delete(keys)
             if result < len(document_ids):