diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
index ed7ae1f..b4f6e0a 100644
--- a/.github/workflows/run_test.yml
+++ b/.github/workflows/run_test.yml
@@ -46,15 +46,20 @@ jobs:
       # We need to conserve mkvtoolnix in the PATH env variable.
       # From https://stackoverflow.com/a/73981698/15835974
 
-    - name: Install pytest and coverage
+    - name: Install dependencies
       run: |
         pip install pytest
         pip install coverage
+        pip install mypy
 
     - name: Run tests
       run: |
         pytest
 
+    - name: Typecheck with mypy
+      run: |
+        mypy
+
     - name: Generate coverage report
       run: |
         coverage run -m pytest
diff --git a/README.md b/README.md
index 841aea1..581f33d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # FontCollector
 [![FontCollector test code coverage](https://img.shields.io/codecov/c/github/moi15moi/FontCollector)](https://app.codecov.io/github/moi15moi/FontCollector)
+[![FontCollector mypy verification](https://img.shields.io/badge/mypy-checked-blue)](https://github.com/moi15moi/FontCollector/actions?query=branch:main)
 
 FontCollector for Advanced SubStation Alpha file.
 This tool allows to recover and/or mux the fonts necessary in an mkv.
diff --git a/font_collector/system_lang/mac_lang.py b/font_collector/system_lang/mac_lang.py
index c6d187b..2aac2cb 100644
--- a/font_collector/system_lang/mac_lang.py
+++ b/font_collector/system_lang/mac_lang.py
@@ -15,7 +15,6 @@ def get_lang() -> str:
 
         if MacLang.__core_foundation is None:
             MacLang.__load__core_foundation()
-
         assert MacLang.__core_foundation is not None # just to make mypy happy
 
         languages = MacLang.__core_foundation.CFLocaleCopyPreferredLanguages()
diff --git a/font_collector/system_lang/windows_lang.py b/font_collector/system_lang/windows_lang.py
index f57ec12..c19f281 100644
--- a/font_collector/system_lang/windows_lang.py
+++ b/font_collector/system_lang/windows_lang.py
@@ -1,6 +1,6 @@
 from ..font.name import Name, PlatformID
 from .abc_system_lang import ABCSystemLang
-from ctypes import windll, wintypes
+from ctypes import windll, wintypes # type: ignore
 
 
 class WindowsLang(ABCSystemLang):
diff --git a/pyproject.toml b/pyproject.toml
index b22aede..cd7a166 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,12 @@ include = ["font_collector*"]
 
 [tool.mypy]
 warn_unused_configs = true
+warn_unused_ignores = false
 strict = true
+files = [
+    # TODO Add the tests folder
+    "font_collector"
+]
 
 [[tool.mypy.overrides]]
 module = "ass.*"