diff --git a/main.py b/main.py
index d156075..7c4394a 100644
--- a/main.py
+++ b/main.py
@@ -132,7 +132,7 @@ class Main:
         # 会話の履歴
         histories: list = []
 
-        while (True):
+        while True:
             # 観測地の日づけ更新
             observer.date: datetime = datetime.now ().date ()