diff --git a/pyproject.toml b/pyproject.toml
index 33cd274..c253f60 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,10 +57,11 @@ test = [
     "pympler",
 ]
 check = [
+    "mypy>=0.990",
     "flake8<6",
     "flake8-black",
     "flake8-colors",
-    "flake8-isort>=4.2.0",
+    "flake8-isort>=4.2.0,<5.0.0",
     "flake8-pyi",
     "flake8-typing-imports",
     "docutils",
@@ -121,10 +122,34 @@ use_parentheses = true
 ensure_newline_before_comments = true
 
 [tool.mypy]
-warn_redundant_casts = true
-warn_unused_ignores = true
+# Untyped definitions and calls are disable in default
+check_untyped_defs = false
+disallow_incomplete_defs = false
+disallow_untyped_calls = false
+disallow_untyped_defs = false
+disallow_untyped_decorators = false
+# not a all 3rd party package has type hints
+ignore_missing_imports = true
+# Optional check: implicit check enabled in mypy 0.980 or before
 strict_optional = true
+implicit_optional = false
+# Enable incremental mode and use sqlite cache
+incremental = true
+sqlite_cache = true
+# Enables PEP 420 style namespace packages
+namespace_packages = true
+# Control error output
+pretty = true
+color_output = true
+show_error_context = false
 show_column_numbers = true
+error_summary = true
+# configuring warnings
+warn_no_return = true
+warn_redundant_casts = true
+warn_return_any = true
+warn_unreachable = true
+warn_unused_ignores = true
 
 [tool.pytest.ini_options]
 minversion = "6.0"
@@ -141,7 +166,7 @@ markers = [
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = check, docs, py{37,38,39,310,311}, py39d, mprof, fil
+envlist = check, docs, py{37,38,39,310,311}, py39d, mprof, fil, mypy
 isolated_build = True
 
 [testenv]
@@ -162,6 +187,15 @@ commands =
     check-manifest {toxinidir}
     flake8 aqt tests
 
+[testenv:mypy]
+basepython = python3.9
+extras = check
+commands = mypy aqt
+deps =
+    types-requests
+    types-beautifulsoup4
+    types-psutil
+
 [testenv:docs]
 basepython = python3.9
 extras = docs
@@ -207,7 +241,7 @@ commands =
 [gh-actions]
 python =
     3.8: py38, docs, check
-    3.9: py39
+    3.9: py39, mypy
     3.10: py310
     3.11: py311
 """