diff --git a/utils/README.md b/utils/README.md
index b30165b..8441748 100644
--- a/utils/README.md
+++ b/utils/README.md
@@ -8,5 +8,11 @@ Automatically ban IPs that try to brute force crack the server.
 
     python autoban.py < /var/log/shadowsocks.log
 
-Use `-c` to specify with how many failure times it should be considered an
+Use `-c` to specify with how many failure times it should be considered as an
 attack. Default is 3.
+
+To continue watching for the log file:
+
+    nohup tail -f /var/log/shadowsocks.log | python autoban.py >log 2>log &
+
+Use with caution. Avoid to ban yourself.
diff --git a/utils/autoban.py b/utils/autoban.py
index 9c81f6e..d04ebbe 100755
--- a/utils/autoban.py
+++ b/utils/autoban.py
@@ -32,7 +32,7 @@ if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='See README')
     parser.add_argument('-c', '--count', default=3, type=int,
                         help='with how many failure times it should be '
-                             'considered an attack')
+                             'considered as an attack')
     config = parser.parse_args()
     ips = {}
     banned = set()