diff --git a/telegram/ext/updater.py b/telegram/ext/updater.py
index 91e184da2..c64bad23a 100644
--- a/telegram/ext/updater.py
+++ b/telegram/ext/updater.py
@@ -330,6 +330,7 @@ class Updater(object):
                     # Disable webhook for cleaning
                     self.bot.setWebhook(webhook_url='')
                     self._clean_updates()
+                    sleep(1)
 
                 self.bot.setWebhook(webhook_url=webhook_url, certificate=cert)
             except (Unauthorized, InvalidToken):