diff --git a/simple_backup/simple_backup.py b/simple_backup/simple_backup.py
index 603ca4a..f4d9431 100755
--- a/simple_backup/simple_backup.py
+++ b/simple_backup/simple_backup.py
@@ -560,11 +560,11 @@ class Backup:
                 f'{self._exclude_path} --files-from={self._inputs_path} / "{self._server}{self._output_dir}"'
 
         if self.ssh_keyfile is not None:
-            rsync = f'{rsync} -e \'ssh -i {self.ssh_keyfile} -o StrictHostKeyChecking=no\''
+            rsync = f'{rsync} -e \'ssh -i {self.ssh_keyfile} -o StrictHostKeyChecking=accept-new\''
         elif self._password_auth and which('sshpass'):
-            rsync = f'{rsync} -e \'sshpass -e ssh -l {self.ssh_user} -o StrictHostKeyChecking=no\''
+            rsync = f'{rsync} -e \'sshpass -e ssh -l {self.ssh_user} -o StrictHostKeyChecking=accept-new\''
         else:
-            rsync = f'{rsync} -e \'ssh -o StrictHostKeyChecking=no\''
+            rsync = f'{rsync} -e \'ssh -o StrictHostKeyChecking=accept-new\''
 
         if self._remote and self.remote_sudo:
             rsync = f'{rsync} --rsync-path="sudo rsync"'