diff --git a/app/main.py b/app/main.py
index f20e43c..a13425f 100644
--- a/app/main.py
+++ b/app/main.py
@@ -5,7 +5,7 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.common.keys import Keys
-import time,os
+import time,os,random
 
 import r_kuji
 
@@ -13,6 +13,7 @@ import r_kuji
 profile_dir = "/tmp/profile"
 username = os.environ["RAKUTENID"]
 password = os.environ["RAKUTENPW"]
+user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36 Edg/113.0.1774.57"
 rch_time = int(os.environ["RCH_WATCH_TIME"])
 rch_num = int(os.environ["RCH_WATCH_NUM"])
 target_url = "https://channel.rakuten.co.jp/"
@@ -30,6 +31,7 @@ def gen_driver():
     options = webdriver.ChromeOptions()
     options.add_argument("--window-size=1920,1080")
     options.add_argument("--user-data-dir=" + profile_dir )
+    options.add_argument('--user-agent=' + user_agent )
 
     driver = webdriver.Remote(
         command_executor="http://selenium:4444/wd/hub",
@@ -101,8 +103,9 @@ def watching_rch():
     element = wait.until(EC.presence_of_element_located((By.TAG_NAME, 'body')))
 
     for i in range(0, rch_num):
-        # 30秒待機
-        time.sleep(30)
+        # 30秒～150秒待機
+        random_seconds = random.randint(30, 150)
+        time.sleep(random_seconds)
 
         print( "Rチャンネル:" + str( i + 1) + "番目のチャンネルの視聴を始めます。視聴時間は" + str(rch_time) + "秒に設定されています。")
         
@@ -140,7 +143,9 @@ def main():
     watching_rch()
 
 if __name__ == '__main__':
-    time.sleep(60) # selniumコンテナの起動を待つ待機
+    # 60-900秒待機 (毎日同時刻にアクセスすることを回避)
+    random_seconds = random.randint(60, 900)
+    time.sleep(random_seconds) # selniumコンテナの起動を待つ待機
     main()
     try: 
         r_kuji.rkuji()