diff --git a/tradingagents/dataflows/openai.py b/tradingagents/dataflows/openai.py
index c75151e2..6ba69361 100644
--- a/tradingagents/dataflows/openai.py
+++ b/tradingagents/dataflows/openai.py
@@ -166,6 +166,7 @@ def get_whitepaper_openai(symbol):
                 "search_context_size": "low",
             }
         ],
+        tool_choice={"type": "web_search_preview"},
         temperature=1,
         max_output_tokens=4096,
         top_p=1,