diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9d0da6a6..48e79b89 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,6 +30,9 @@ jobs:
     - name: Build binaries
       run: |
         ./venv/scripts/activate
+        mypy game
+        mypy gen
+        mypy theater
         $env:PYTHONPATH=".;./pydcs"
         pyinstaller pyinstaller.spec
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5fad7bff..33d78ae3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -32,6 +32,9 @@ jobs:
     - name: Build binaries
       run: |
         ./venv/scripts/activate
+        mypy game
+        mypy gen
+        mypy theater
         $env:PYTHONPATH=".;./pydcs"
         pyinstaller pyinstaller.spec
 
diff --git a/requirements.txt b/requirements.txt
index 12d48655..3ce6e8d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,9 @@
-#pydcs>=0.9.10
 Pyside2>=5.13.0
 pyinstaller==3.6
 pyproj==2.6.1.post1
 
 Pillow~=7.2.0
-tabulate~=0.8.7
\ No newline at end of file
+tabulate~=0.8.7
+
+mypy==0.782
+mypy-extensions==0.4.3
\ No newline at end of file