diff --git a/changelog.d/385.bugfix b/changelog.d/385.bugfix
new file mode 100644
index 00000000..45c4bb69
--- /dev/null
+++ b/changelog.d/385.bugfix
@@ -0,0 +1 @@
+Change package name back to matrix-sygnal.
diff --git a/pyproject.toml b/pyproject.toml
index 694a7278..dd0b1fb6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,12 +55,15 @@ requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
-name = "sygnal"
+name = "matrix-sygnal"
 version = "0.14.4"
 description = "Reference Push Gateway for Matrix Notifications"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 readme = "README.md"
 license = "Apache-2.0"
+packages = [
+    { include = "sygnal" },
+]
 include = [
     { path = "tests", format = "sdist" },
 ]
diff --git a/sygnal/http.py b/sygnal/http.py
index 9669b71d..bc348926 100644
--- a/sygnal/http.py
+++ b/sygnal/http.py
@@ -19,7 +19,7 @@
 import sys
 import time
 import traceback
-from typing import TYPE_CHECKING, Callable, List, Union
+from typing import TYPE_CHECKING, Any, Callable, List, Union
 from uuid import uuid4
 
 from opentracing import Format, Span, logs, tags
@@ -177,7 +177,7 @@ def _handle_request(self, request: Request) -> Union[int, bytes]:
 
             root_span_accounted_for = True
 
-            async def cb():
+            async def cb() -> None:
                 with REQUESTS_IN_FLIGHT_GUAGE.labels(
                     self.__class__.__name__
                 ).track_inprogress():
@@ -342,7 +342,10 @@ class SygnalLoggedSite(server.Site):
     """
 
     def __init__(
-        self, *args, log_formatter: Callable[[str, server.Request], str], **kwargs
+        self,
+        *args: Any,
+        log_formatter: Callable[[str, server.Request], str],
+        **kwargs: Any,
     ):
         super().__init__(*args, **kwargs)
         self.log_formatter = log_formatter
diff --git a/sygnal/notifications.py b/sygnal/notifications.py
index ec734174..10ab44ca 100644
--- a/sygnal/notifications.py
+++ b/sygnal/notifications.py
@@ -83,7 +83,7 @@ def __init__(self, raw: Dict[str, Any]):
 
 
 class Notification:
-    def __init__(self, notif):
+    def __init__(self, notif: dict):
         # optional attributes
         self.room_name: Optional[str] = notif.get("room_name")
         self.room_alias: Optional[str] = notif.get("room_alias")
diff --git a/sygnal/sygnal.py b/sygnal/sygnal.py
index ce3ca5cf..2921e1f6 100644
--- a/sygnal/sygnal.py
+++ b/sygnal/sygnal.py
@@ -20,7 +20,7 @@
 import logging.config
 import os
 import sys
-from typing import Any, Dict, Set, cast
+from typing import Any, Dict, Generator, Set, cast
 
 import opentracing
 import prometheus_client
@@ -28,7 +28,7 @@
 from opentracing import Tracer
 from opentracing.scope_managers.asyncio import AsyncioScopeManager
 from twisted.internet import asyncioreactor, defer
-from twisted.internet.defer import ensureDeferred
+from twisted.internet.defer import Deferred, ensureDeferred
 from twisted.internet.interfaces import (
     IReactorCore,
     IReactorFDSet,
@@ -223,7 +223,7 @@ def run(self) -> None:
         """
 
         @defer.inlineCallbacks
-        def start():
+        def start() -> Generator[Deferred[Any], Any, Any]:
             try:
                 yield ensureDeferred(self.make_pushkins_then_start())
             except Exception:
@@ -337,7 +337,7 @@ def merge_left_with_defaults(
     return result
 
 
-def main():
+def main() -> None:
     # TODO we don't want to have to install the reactor, when we can get away with
     #   it
     asyncioreactor.install()