diff --git a/agents_core/llm_client.py b/agents_core/llm_client.py
index 3fe64c2..f8d12ad 100644
--- a/agents_core/llm_client.py
+++ b/agents_core/llm_client.py
@@ -8,7 +8,7 @@ from typing import Optional
 
 logger = logging.getLogger(__name__)
 
-DEFAULT_TIMEOUT = 120
+DEFAULT_TIMEOUT = 300
 MAX_HISTORY = 20  # messages conservés dans le contexte