diff --git a/libervia/backend/core/xmpp.py b/libervia/backend/core/xmpp.py
index 0b4e067f..e49731ed 100644
--- a/libervia/backend/core/xmpp.py
+++ b/libervia/backend/core/xmpp.py
@@ -734,31 +734,32 @@ class SatXMPPEntity(core_types.SatXMPPEntity):
         await self.a_send(mess_data["xml"])
         return mess_data
 
+
     def sendMessage(
         self,
-        to_jid,
-        message,
-        subject=None,
-        mess_type="auto",
-        extra=None,
-        uid=None,
-        no_trigger=False,
-    ):
+        to_jid: jid.JID,
+        message: dict[str, str],
+        subject: dict[str, str] | None = None,
+        mess_type: str = "auto",
+        extra: dict[str, str] | None = None,
+        uid: str | None = None,
+        no_trigger: bool = False,
+    ) -> defer.Deferred:
         r"""Send a message to an entity
 
-        @param to_jid(jid.JID): destinee of the message
-        @param message(dict): message body, key is the language (use '' when unknown)
-        @param subject(dict): message subject, key is the language (use '' when unknown)
-        @param mess_type(str): one of standard message type (cf RFC 6121 §5.2.2) or:
+        @param to_jid: destinee of the message
+        @param message: message body, key is the language (use '' when unknown)
+        @param subject: message subject, key is the language (use '' when unknown)
+        @param mess_type: one of standard message type (cf RFC 6121 §5.2.2) or:
             - auto: for automatic type detection
             - info: for information ("info_type" can be specified in extra)
-        @param extra(dict, None): extra data. Key can be:
+        @param extra: extra data. Key can be:
             - info_type: information type, can be
                 TODO
-        @param uid(unicode, None): unique id:
+        @param uid: unique id:
             should be unique at least in this XMPP session
             if None, an uuid will be generated
-        @param no_trigger (bool): if True, sendMessage[suffix] trigger will no be used
+        @param no_trigger: if True, sendMessage[suffix] trigger will no be used
             useful when a message need to be sent without any modification
             /!\ this will also skip encryption methods!
         """
diff --git a/libervia/backend/plugins/plugin_comp_ap_gateway/__init__.py b/libervia/backend/plugins/plugin_comp_ap_gateway/__init__.py
index 0b9aba54..17c7add1 100644
--- a/libervia/backend/plugins/plugin_comp_ap_gateway/__init__.py
+++ b/libervia/backend/plugins/plugin_comp_ap_gateway/__init__.py
@@ -329,7 +329,7 @@ class APGateway:
         )
         await self.init(client)
 
-    def profile_connected(self, client):
+    def profile_connected(self, client) -> None:
         self.ad_hoc.init(client)
 
     async def _items_received(
diff --git a/libervia/backend/plugins/plugin_exp_jingle_stream.py b/libervia/backend/plugins/plugin_exp_jingle_stream.py
index d087f5ef..d185aa0e 100644
--- a/libervia/backend/plugins/plugin_exp_jingle_stream.py
+++ b/libervia/backend/plugins/plugin_exp_jingle_stream.py
@@ -34,7 +34,6 @@ from libervia.backend.core.log import getLogger
 from libervia.backend.tools import xml_tools
 from libervia.backend.tools import stream
 
-
 log = getLogger(__name__)
 
 NS_STREAM = "http://salut-a-toi.org/protocol/stream"
diff --git a/libervia/backend/plugins/plugin_exp_pubsub_hook.py b/libervia/backend/plugins/plugin_exp_pubsub_hook.py
index 3cd01a11..69ae0fbe 100644
--- a/libervia/backend/plugins/plugin_exp_pubsub_hook.py
+++ b/libervia/backend/plugins/plugin_exp_pubsub_hook.py
@@ -180,7 +180,8 @@ class PubsubHook(object):
                     except Exception as e:
                         log.warning(
                             _(
-                                "Can't load Pubsub hook at node {node}, it will be removed: {reason}"
+                                "Can't load Pubsub hook at node {node}, it will be"
+                                " removed: {reason}"
                             ).format(node=node, reason=e)
                         )
                         hooks_list.remove(hook_data)
diff --git a/libervia/backend/plugins/plugin_import.py b/libervia/backend/plugins/plugin_import.py
index 60b81fe0..5388fa64 100644
--- a/libervia/backend/plugins/plugin_import.py
+++ b/libervia/backend/plugins/plugin_import.py
@@ -30,7 +30,6 @@ import collections
 import uuid
 import json
 
-
 PLUGIN_INFO = {
     C.PI_NAME: "import",
     C.PI_IMPORT_NAME: "IMPORT",
diff --git a/libervia/backend/plugins/plugin_merge_req_mercurial.py b/libervia/backend/plugins/plugin_merge_req_mercurial.py
index c03e8397..bd4076e9 100644
--- a/libervia/backend/plugins/plugin_merge_req_mercurial.py
+++ b/libervia/backend/plugins/plugin_merge_req_mercurial.py
@@ -75,7 +75,7 @@ class MercurialHandler(object):
             MercurialProtocol.command = which("hg")[0]
         except IndexError:
             raise exceptions.NotFound(
-                _("Mercurial executable (hg) not found, " "can't use Mercurial handler")
+                _("Mercurial executable (hg) not found, can't use Mercurial handler")
             )
         self.host = host
         self._m = host.plugins["MERGE_REQUESTS"]