diff --git a/masakari/conf/engine.py b/masakari/conf/engine.py
index 118e3ae0..cd19227f 100644
--- a/masakari/conf/engine.py
+++ b/masakari/conf/engine.py
@@ -90,6 +90,7 @@ notification_opts = [
                     'are in error or new state.'),
     cfg.IntOpt('retry_notification_new_status_interval',
                default=60,
+               mutable=True,
                help="Interval in seconds for identifying notifications which "
                     "are in new state. If the notification is in new state "
                     "till this config option value after it's "
diff --git a/masakari/service.py b/masakari/service.py
index 949a105f..df7eda94 100644
--- a/masakari/service.py
+++ b/masakari/service.py
@@ -271,7 +271,7 @@ class WSGIService(service.Service):
 
 
 def process_launcher():
-    return service.ProcessLauncher(CONF)
+    return service.ProcessLauncher(CONF, restart_method='mutate')
 
 
 # NOTE: the global launcher is to maintain the existing
@@ -285,7 +285,8 @@ def serve(server, workers=None):
     if _launcher:
         raise RuntimeError(_('serve() can only be called once'))
 
-    _launcher = service.launch(CONF, server, workers=workers)
+    _launcher = service.launch(CONF, server, workers=workers,
+                               restart_method='mutate')
 
 
 def wait():
diff --git a/masakari/tests/unit/test_service.py b/masakari/tests/unit/test_service.py
index 04609ee1..a7c9d52c 100644
--- a/masakari/tests/unit/test_service.py
+++ b/masakari/tests/unit/test_service.py
@@ -160,7 +160,8 @@ class TestLauncher(test.NoDBTestCase):
         service.serve(mock.sentinel.service)
         mock_launch.assert_called_once_with(mock.ANY,
                                             mock.sentinel.service,
-                                            workers=None)
+                                            workers=None,
+                                            restart_method='mutate')
 
     @mock.patch.object(_service, 'launch')
     def test_launch_app_with_workers(self, mock_launch):
@@ -168,7 +169,8 @@ class TestLauncher(test.NoDBTestCase):
         service.serve(mock.sentinel.service, workers=mock.sentinel.workers)
         mock_launch.assert_called_once_with(mock.ANY,
                                             mock.sentinel.service,
-                                            workers=mock.sentinel.workers)
+                                            workers=mock.sentinel.workers,
+                                            restart_method='mutate')
 
     @mock.patch.object(_service, 'launch')
     def test_launch_app_more_than_once_raises(self, mock_launch):
diff --git a/releasenotes/notes/bp-mutable-config-57efdd467c01aa7b.yaml b/releasenotes/notes/bp-mutable-config-57efdd467c01aa7b.yaml
new file mode 100644
index 00000000..8bb86cc8
--- /dev/null
+++ b/releasenotes/notes/bp-mutable-config-57efdd467c01aa7b.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Masakari has been enabled for mutable config.
+    Below option may be reloaded by sending SIGHUP to the correct process.
+
+    'retry_notification_new_status_interval' option will apply to process
+    unfinished notifications.