diff --git a/nanobot/session/manager.py b/nanobot/session/manager.py
index 9549fd2..9fce9ee 100644
--- a/nanobot/session/manager.py
+++ b/nanobot/session/manager.py
@@ -41,7 +41,7 @@ class Session:
         self.messages.append(msg)
         self.updated_at = datetime.now()
     
-    def get_history(self, max_messages: int = 50) -> list[dict[str, Any]]:
+    def get_history(self, max_messages: int = 500) -> list[dict[str, Any]]:
         """
         Get message history for LLM context.