diff --git a/backend/open_webui/routers/retrieval.py b/backend/open_webui/routers/retrieval.py
index 045366900..9b52a04b7 100644
--- a/backend/open_webui/routers/retrieval.py
+++ b/backend/open_webui/routers/retrieval.py
@@ -1493,11 +1493,11 @@ async def process_web_search(
         else:
             collection_names = []
             for doc_idx, doc in enumerate(docs):
-                collection_name = f"web-search-{calculate_sha256_string(
-                    f"{form_data.query}-{urls[doc_idx]}"
-                )}"[:63]
-                collection_names.append(collection_name)
+                collection_name = f"web-search-{calculate_sha256_string(form_data.query + '-' + urls[doc_idx])}"[
+                    :63
+                ]
 
+                collection_names.append(collection_name)
 
                 await run_in_threadpool(
                     save_docs_to_vector_db,