diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5e2e5fae5..33dee0d65 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -47,7 +47,8 @@ repos:
       - id: mypy
         exclude: "ipykernel.*tests"
         args: ["--config-file", "pyproject.toml"]
-        additional_dependencies: [tornado, jupyter_client, pytest]
+        additional_dependencies:
+          [tornado, jupyter_client, pytest, traitlets, jupyter_core]
         stages: [manual]
 
   - repo: https://github.com/pycqa/flake8
diff --git a/ipykernel/inprocess/ipkernel.py b/ipykernel/inprocess/ipkernel.py
index d2b2e8f32..aaaa5099f 100644
--- a/ipykernel/inprocess/ipkernel.py
+++ b/ipykernel/inprocess/ipkernel.py
@@ -48,7 +48,7 @@ class InProcessKernel(IPythonKernel):
 
     shell_class = Type(allow_none=True)
     _underlying_iopub_socket = Instance(DummySocket, ())
-    iopub_thread = Instance(IOPubThread)
+    iopub_thread: IOPubThread = Instance(IOPubThread)  # type:ignore[assignment]
 
     shell_stream = Instance(DummySocket, ())
 
@@ -58,13 +58,13 @@ def _default_iopub_thread(self):
         thread.start()
         return thread
 
-    iopub_socket = Instance(BackgroundSocket)
+    iopub_socket: BackgroundSocket = Instance(BackgroundSocket)  # type:ignore[assignment]
 
     @default("iopub_socket")
     def _default_iopub_socket(self):
         return self.iopub_thread.background_socket
 
-    stdin_socket = Instance(DummySocket, ())
+    stdin_socket = Instance(DummySocket, ())  # type:ignore[assignment]
 
     def __init__(self, **traits):
         super().__init__(**traits)
@@ -127,6 +127,7 @@ def _redirected_io(self):
 
     def _io_dispatch(self, change):
         """Called when a message is sent to the IO socket."""
+        assert self.iopub_socket.io_thread is not None
         ident, msg = self.session.recv(self.iopub_socket.io_thread.socket, copy=False)
         for frontend in self.frontends:
             frontend.iopub_channel.call_handlers(msg)
@@ -163,7 +164,9 @@ def _default_stderr(self):
 
 class InProcessInteractiveShell(ZMQInteractiveShell):
 
-    kernel = Instance("ipykernel.inprocess.ipkernel.InProcessKernel", allow_none=True)
+    kernel: InProcessKernel = Instance(
+        "ipykernel.inprocess.ipkernel.InProcessKernel", allow_none=True
+    )  # type:ignore[assignment]
 
     # -------------------------------------------------------------------------
     # InteractiveShell interface
diff --git a/ipykernel/kernelapp.py b/ipykernel/kernelapp.py
index 1f5804871..8e6084671 100644
--- a/ipykernel/kernelapp.py
+++ b/ipykernel/kernelapp.py
@@ -28,7 +28,7 @@
 from jupyter_client.session import Session, session_aliases, session_flags
 from jupyter_core.paths import jupyter_runtime_dir
 from tornado import ioloop
-from traitlets import (
+from traitlets.traitlets import (
     Any,
     Bool,
     Dict,
diff --git a/ipykernel/kernelbase.py b/ipykernel/kernelbase.py
index 74e0ba71e..617729cf8 100644
--- a/ipykernel/kernelbase.py
+++ b/ipykernel/kernelbase.py
@@ -38,7 +38,8 @@
 from jupyter_client.session import Session
 from tornado import ioloop
 from tornado.queues import Queue, QueueEmpty
-from traitlets import (
+from traitlets.config.configurable import SingletonConfigurable
+from traitlets.traitlets import (
     Any,
     Bool,
     Dict,
@@ -51,7 +52,6 @@
     default,
     observe,
 )
-from traitlets.config.configurable import SingletonConfigurable
 from zmq.eventloop.zmqstream import ZMQStream
 
 from ipykernel.jsonutil import json_clean
@@ -95,6 +95,10 @@ def _update_eventloop(self, change):
         """
     )
 
+    implementation: str
+    implementation_version: str
+    banner: str
+
     @default("shell_streams")
     def _shell_streams_default(self):
         warnings.warn(
@@ -131,7 +135,7 @@ def _shell_streams_changed(self, change):
     iopub_socket = Any()
     iopub_thread = Any()
     stdin_socket = Any()
-    log = Instance(logging.Logger, allow_none=True)
+    log: logging.Logger = Instance(logging.Logger, allow_none=True)  # type:ignore[assignment]
 
     # identities:
     int_id = Integer(-1)
@@ -263,7 +267,7 @@ def __init__(self, **kwargs):
         for msg_type in self.control_msg_types:
             self.control_handlers[msg_type] = getattr(self, msg_type)
 
-        self.control_queue: Queue[Any] = Queue()
+        self.control_queue: Queue[t.Any] = Queue()
 
     def dispatch_control(self, msg):
         self.control_queue.put_nowait(msg)
@@ -531,7 +535,7 @@ def schedule_dispatch(self, dispatch, *args):
     def start(self):
         """register dispatchers for streams"""
         self.io_loop = ioloop.IOLoop.current()
-        self.msg_queue: Queue[Any] = Queue()
+        self.msg_queue: Queue[t.Any] = Queue()
         self.io_loop.add_callback(self.dispatch_queue)
 
         self.control_stream.on_recv(self.dispatch_control, copy=False)
@@ -866,7 +870,7 @@ async def comm_info_request(self, stream, ident, parent):
         if hasattr(self, "comm_manager"):
             comms = {
                 k: dict(target_name=v.target_name)
-                for (k, v) in self.comm_manager.comms.items()
+                for (k, v) in self.comm_manager.comms.items()  # type:ignore[attr-defined]
                 if v.target_name == target_name or target_name is None
             }
         else:
diff --git a/ipykernel/kernelspec.py b/ipykernel/kernelspec.py
index 585d87127..ac8552afe 100644
--- a/ipykernel/kernelspec.py
+++ b/ipykernel/kernelspec.py
@@ -12,6 +12,7 @@
 import tempfile
 
 from jupyter_client.kernelspec import KernelSpecManager
+from traitlets import Unicode
 
 from .debugger import _is_debugpy_available
 
@@ -161,7 +162,7 @@ def install(
 class InstallIPythonKernelSpecApp(Application):
     """Dummy app wrapping argparse"""
 
-    name = "ipython-kernel-install"
+    name = Unicode("ipython-kernel-install")
 
     def initialize(self, argv=None):
         if argv is None: