diff --git a/indicator_alertmanager.py b/indicator_alertmanager.py
index af083d146953e03dd1e1f498a6fd9f2492785983..257ac8dbbea6333f1db88f35394981bd72f30464 100755
--- a/indicator_alertmanager.py
+++ b/indicator_alertmanager.py
@@ -12,15 +12,14 @@ from threading import Thread
 
 import plac
 import gi
-gi.require_version('Gtk', '3.0')
-gi.require_version('AppIndicator3', '0.1')
-#pylint: disable=wrong-import-position
-from gi.repository import Gtk, AppIndicator3, GLib
 import yaml
+from gi.repository import Gtk, AppIndicator3, GLib  # type: ignore
 from query_alertmanager import get_alerts
-#pylint: enable=wrong-import-position
+gi.require_version('Gtk', '3.0')
+gi.require_version('AppIndicator3', '0.1')
 
 
+# pylint: disable=too-many-instance-attributes
 class Indicator():
     """Main class."""
 
@@ -29,7 +28,8 @@ class Indicator():
         """Initialize idicator."""
 
         # Load config
-        config_file = open(Path.expanduser(config))
+        config_file = open(Path.expanduser(config),
+                           encoding="UTF8")  # type:ignore
         opts = yaml.load(config_file, Loader=yaml.FullLoader)
         self.url = opts.get('url')
         self.port = opts.get('port', 443)
@@ -48,6 +48,7 @@ class Indicator():
         # the thread:
         self.update = Thread(target=self.show_alerts)
         # daemonize the thread to make the indicator stopable
+        # pylint: disable=deprecated-method
         self.update.setDaemon(True)
         self.update.start()
 
@@ -75,22 +76,22 @@ class Indicator():
         """Show alerts."""
         while True:
             alerts = get_alerts(url=self.url, port=self.port, user=self.user,
-                password=self.password)
+                                password=self.password)
             # print(alerts)
             # apply the interface update
             GLib.idle_add(
                 self.indicator.set_label,
                 alerts['summary'], self.app,
-                priority=GLib.PRIORITY_DEFAULT )
+                priority=GLib.PRIORITY_DEFAULT)
             if alerts['count'] > 0:
-              icon = self.icon_red
+                icon = self.icon_red
             else:
-              icon = self.icon_green
+                icon = self.icon_green
 
-            GLib.idle_add( self.indicator.set_icon, icon)
+            GLib.idle_add(self.indicator.set_icon, icon)
             time.sleep(30)
 
-    def alert_details(self, source):
+    def alert_details(self):
         """Open browser with alertmanager URL."""
         # alerts = get_alerts()
         # alert_count = len(alerts)
@@ -100,8 +101,7 @@ class Indicator():
         # self.menu.append(alerts_item)
         os.system(f"xdg-open {self.url}:{self.port}")
 
-
-    def stop(self, source):
+    def stop(self):
         """Exit indicator."""
         Gtk.main_quit()