diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 75ad87bf..8d9c03b7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -57,5 +57,13 @@ repos:
         args: [--prose-wrap=always, --print-width=88]
         exclude: ^.github/ISSUE_TEMPLATE/bug_report.md$
 
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: "v0.982"
+    hooks:
+      - id: mypy
+        additional_dependencies: [types-colorama, types-setuptools]
+        args: [--pretty, --show-error-codes]
+        exclude: ^tests/
+
 ci:
   autoupdate_schedule: quarterly
diff --git a/src/prettytable/__init__.py b/src/prettytable/__init__.py
index badac567..d0f5adc7 100644
--- a/src/prettytable/__init__.py
+++ b/src/prettytable/__init__.py
@@ -49,6 +49,6 @@
     import importlib.metadata as importlib_metadata
 except ImportError:
     # <Python 3.7 and lower
-    import importlib_metadata
+    import importlib_metadata  # type: ignore
 
 __version__ = importlib_metadata.version(__name__)
diff --git a/src/prettytable/colortable.py b/src/prettytable/colortable.py
index dd5495aa..9a3a06b0 100644
--- a/src/prettytable/colortable.py
+++ b/src/prettytable/colortable.py
@@ -4,13 +4,11 @@
 
 try:
     from colorama import init
-except ImportError:
-    # Do nothing if not installed
-    def init():
-        pass
 
+    init()
+except ImportError:
+    pass
 
-init()
 
 RESET_CODE = "\x1b[0m"
 
@@ -34,6 +32,7 @@ def __init__(
         self.junction_char = junction_char
         self.junction_color = Theme.format_code(junction_color)
 
+    @staticmethod
     def format_code(s: str) -> str:
         """Takes string and intelligently puts it into an ANSI escape sequence"""
         if s.strip() == "":
diff --git a/src/prettytable/prettytable.py b/src/prettytable/prettytable.py
index 18379ce1..3fcedea2 100644
--- a/src/prettytable/prettytable.py
+++ b/src/prettytable/prettytable.py
@@ -45,7 +45,7 @@
 from html.parser import HTMLParser
 from typing import Any
 
-import wcwidth
+import wcwidth  # type: ignore
 
 # hrule styles
 FRAME = 0
@@ -134,8 +134,8 @@ def __init__(self, field_names=None, **kwargs) -> None:
         self.encoding = kwargs.get("encoding", "UTF-8")
 
         # Data
-        self._field_names = []
-        self._rows = []
+        self._field_names: list[str] = []
+        self._rows: list[list] = []
         self.align = {}
         self.valign = {}
         self.max_width = {}
@@ -147,7 +147,7 @@ def __init__(self, field_names=None, **kwargs) -> None:
         if field_names:
             self.field_names = field_names
         else:
-            self._widths = []
+            self._widths: list[int] = []
 
         # Options
         self._options = [
@@ -206,7 +206,7 @@ def __init__(self, field_names=None, **kwargs) -> None:
         self._start = kwargs["start"] or 0
         self._end = kwargs["end"] or None
         self._fields = kwargs["fields"] or None
-        self._none_format = {}
+        self._none_format: dict[None, None] = {}
 
         if kwargs["header"] in (True, False):
             self._header = kwargs["header"]
@@ -2031,7 +2031,7 @@ def get_json_string(self, **kwargs) -> str:
         """
 
         options = self._get_options(kwargs)
-        json_options = dict(indent=4, separators=(",", ": "), sort_keys=True)
+        json_options: Any = dict(indent=4, separators=(",", ": "), sort_keys=True)
         json_options.update(
             {key: value for key, value in kwargs.items() if key not in options}
         )
@@ -2423,9 +2423,9 @@ class TableHandler(HTMLParser):
     def __init__(self, **kwargs) -> None:
         HTMLParser.__init__(self)
         self.kwargs = kwargs
-        self.tables = []
-        self.last_row = []
-        self.rows = []
+        self.tables: list[list] = []
+        self.last_row: list[str] = []
+        self.rows: list[Any] = []
         self.max_row_width = 0
         self.active = None
         self.last_content = ""