diff --git a/src/agents/webSearchAgent.ts b/src/agents/webSearchAgent.ts
index 4303762..709d6aa 100644
--- a/src/agents/webSearchAgent.ts
+++ b/src/agents/webSearchAgent.ts
@@ -485,7 +485,7 @@ const basicWebSearch = (
   llm: BaseChatModel,
   embeddings: Embeddings,
   optimizationMode: 'speed' | 'balanced' | 'quality',
-  fileIds: string[],
+  fileIds: string[] = [],
 ) => {
   const emitter = new eventEmitter();