diff --git a/docs/conf.py b/docs/conf.py
index 290f8baf..1054707c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -16,7 +16,7 @@
 import os.path as osp
 import shutil
 
-from sphinx.util import logging  # type:ignore[import]
+from sphinx.util import logging  # type:ignore[import-not-found]
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -51,7 +51,7 @@ def filter(self, record: pylogging.LogRecord) -> bool:
 # End of a workaround
 
 try:
-    import enchant  # type:ignore[import]  # noqa
+    import enchant  # type:ignore[import-not-found]  # noqa
 
     extensions += ["sphinxcontrib.spelling"]
 except ImportError:
diff --git a/jupyter_client/localinterfaces.py b/jupyter_client/localinterfaces.py
index 9bdde38c..4b9143bd 100644
--- a/jupyter_client/localinterfaces.py
+++ b/jupyter_client/localinterfaces.py
@@ -12,7 +12,7 @@
 LOCAL_IPS: List = []
 PUBLIC_IPS: List = []
 
-LOCALHOST = ""
+LOCALHOST: str = ""
 
 
 def _uniq_stable(elems: Iterable) -> List:
@@ -151,7 +151,7 @@ def _load_ips_ipconfig():
 
 def _load_ips_netifaces():
     """load ip addresses with netifaces"""
-    import netifaces  # type: ignore[import]
+    import netifaces  # type: ignore[import-not-found]
 
     global LOCALHOST
     local_ips = []
diff --git a/jupyter_client/ssh/tunnel.py b/jupyter_client/ssh/tunnel.py
index bb160318..e98e4690 100644
--- a/jupyter_client/ssh/tunnel.py
+++ b/jupyter_client/ssh/tunnel.py
@@ -31,7 +31,7 @@ class SSHException(Exception):  # type:ignore[no-redef]  # noqa
     from .forward import forward_tunnel
 
 try:
-    import pexpect  # type: ignore[import]
+    import pexpect  # type: ignore[import-untyped]
 except ImportError:
     pexpect = None
 
diff --git a/pyproject.toml b/pyproject.toml
index e716c121..edf49e0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -99,7 +99,7 @@ nowarn = "test -W default {args}"
 
 [tool.hatch.envs.typing]
 features = ["test"]
-dependencies = ["mypy>=1.5.1", "traitlets>=5.11.2", "jupyter_core>=5.3.2"]
+dependencies = ["mypy~=1.6", "traitlets>=5.11.2", "jupyter_core>=5.3.2"]
 [tool.hatch.envs.typing.scripts]
 test = "mypy --install-types --non-interactive {args:.}"