diff --git a/pyproject.toml b/pyproject.toml
index 9b173bbe2b..d3c6d940ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ test = [
     "coverage >=6.2,<7.0",
     "pytest-xdist >=1.32.0,<4.0.0",
     "pytest-sugar >=0.9.4,<0.10.0",
-    "mypy ==0.910",
+    "mypy ==0.971",
     "black >=22.3.0,<23.0.0",
     "isort >=5.0.6,<6.0.0",
     "rich >=10.11.0,<14.0.0",
diff --git a/typer/_typing.py b/typer/_typing.py
index d906e2227d..bfa8114fcb 100644
--- a/typer/_typing.py
+++ b/typer/_typing.py
@@ -4,14 +4,13 @@
 
 import sys
 from os import PathLike
-from typing import (  # type: ignore
+from typing import (
     TYPE_CHECKING,
     AbstractSet,
     Any,
     ClassVar,
     Dict,
     Generator,
-    Iterable,
     List,
     Mapping,
     NewType,
diff --git a/typer/completion.py b/typer/completion.py
index 2712d08da4..c42ad95b81 100644
--- a/typer/completion.py
+++ b/typer/completion.py
@@ -1,6 +1,6 @@
 import os
 import sys
-from typing import Any, Dict, Tuple
+from typing import Any, MutableMapping, Tuple
 
 import click
 
@@ -120,7 +120,7 @@ def completion_init() -> None:
 # This is only called in new Command method, only used by Click 8.x+
 def shell_complete(
     cli: click.BaseCommand,
-    ctx_args: Dict[str, Any],
+    ctx_args: MutableMapping[str, Any],
     prog_name: str,
     complete_var: str,
     instruction: str,
diff --git a/typer/core.py b/typer/core.py
index c0776368a6..0c73784c23 100644
--- a/typer/core.py
+++ b/typer/core.py
@@ -9,6 +9,7 @@
     Callable,
     Dict,
     List,
+    MutableMapping,
     Optional,
     Sequence,
     TextIO,
@@ -634,7 +635,7 @@ def _typer_format_options(
 def _typer_main_shell_completion(
     self: click.core.Command,
     *,
-    ctx_args: Dict[str, Any],
+    ctx_args: MutableMapping[str, Any],
     prog_name: str,
     complete_var: Optional[str] = None,
 ) -> None:
@@ -696,7 +697,7 @@ def format_options(
 
     def _main_shell_completion(
         self,
-        ctx_args: Dict[str, Any],
+        ctx_args: MutableMapping[str, Any],
         prog_name: str,
         complete_var: Optional[str] = None,
     ) -> None:
@@ -758,7 +759,7 @@ def format_options(
 
     def _main_shell_completion(
         self,
-        ctx_args: Dict[str, Any],
+        ctx_args: MutableMapping[str, Any],
         prog_name: str,
         complete_var: Optional[str] = None,
     ) -> None:
diff --git a/typer/main.py b/typer/main.py
index aa39e82849..9de5f5960d 100644
--- a/typer/main.py
+++ b/typer/main.py
@@ -51,7 +51,7 @@
 
 
 def except_hook(
-    exc_type: Type[BaseException], exc_value: BaseException, tb: TracebackType
+    exc_type: Type[BaseException], exc_value: BaseException, tb: Optional[TracebackType]
 ) -> None:
     exception_config: Union[DeveloperExceptionConfig, None] = getattr(
         exc_value, _typer_developer_exception_attr_name, None