diff --git a/buildbot.py b/buildbot.py
index f74d34e..1929f5e 100755
--- a/buildbot.py
+++ b/buildbot.py
@@ -55,6 +55,7 @@ class jobsManager:
         self.__curr_job = None
         self.pkgconfigs = load_all_yaml()
         self.last_updatecheck = 0.0
+        self.idle = False
     def _new_buildjob(self, job):
         assert type(job) is Job
         job_to_remove = list()
@@ -124,9 +125,13 @@ class jobsManager:
         if not self.__buildjobs:
             # This part check for updates
             if time() - self.last_updatecheck <= UPDATE_INTERVAL:
+                if not self.idle:
+                    logger.info('Buildbot is idling for package updates.')
+                self.idle = True
                 sleep(60)
                 return
             self.last_updatecheck = time()
+            self.idle = False
             updates = updmgr.check_update()
             for update in updates:
                 (pkgconfig, ver, buildarchs) = update
diff --git a/config.py b/config.py
index b155181..1908846 100644
--- a/config.py
+++ b/config.py
@@ -33,8 +33,8 @@ GPG_VERIFY_CMD = 'gpg --verify'
 
 # Archlinux-Jerry Build Bot <buildbot@mail.jerryxiao.cc>
 GPG_KEY = 'BEE4F1D5A661CA1FEA65C38093962CE07A0D5B7D'
-GPG_SIGN_CMD = (f'gpg --default-key {GPG_KEY} --no-armor'
-                 '--pinentry-mode loopback --passphrase \'\''
+GPG_SIGN_CMD = (f'gpg --default-key {GPG_KEY} --no-armor '
+                 '--pinentry-mode loopback --passphrase \'\' '
                  '--detach-sign --yes --')
 
 #### config for buildbot.py