diff --git a/smtpd_watcher/smtpd_watcher.py b/smtpd_watcher/smtpd_watcher.py
index fd3703f..dafba20 100644
--- a/smtpd_watcher/smtpd_watcher.py
+++ b/smtpd_watcher/smtpd_watcher.py
@@ -48,7 +48,7 @@ class SmtpdWatcher:
     def _read_banned_ips(self):
         ips = {}
         result = subprocess.run(
-            ['/usr/bin/fail2ban-client', 'get', 'postfix', 'banned'],
+            ['/usr/bin/fail2ban-client', 'get', 'postfix', 'banned', '|', 'tr', '-d', '"][\',"'],
             encoding='utf-8',
             check=True,
             capture_output=True,
@@ -56,18 +56,18 @@ class SmtpdWatcher:
         self._log.debug(
             result.stdout
         )
-        ips['postfix'] = json.loads(result.stdout)
+        ips['postfix'] = result.stdout.split(' ')
         self._log.debug(
             "Banned IPs in postfix jail: %s",
             ips['postfix']
         )
         result = subprocess.run(
-            ['/usr/bin/fail2ban-client', 'get', 'postfix-sasl', 'banned'],
+            ['/usr/bin/fail2ban-client', 'get', 'postfix-sasl', 'banned', '|', 'tr', '-d', '"][\',"'],
             encoding='utf-8',
             check=True,
             capture_output=True,
         )
-        ips['postfix-sasl'] = json.loads(result.stdout)
+        ips['postfix-sasl'] = result.stdout.split(' ')
         self._log.debug(
             "Banned IPs in postfix-sasl jail: %s",
             ips['postfix-sasl']