diff --git a/.github/pyright-config.json b/.github/pyright-config.json
new file mode 100644
index 00000000..6ad7fa5f
--- /dev/null
+++ b/.github/pyright-config.json
@@ -0,0 +1,27 @@
+{
+  "include": [
+    "type_check.py",
+    "../worlds/AutoSNIClient.py",
+    "../Patch.py"
+  ],
+
+  "exclude": [
+    "**/__pycache__"
+  ],
+
+  "stubPath": "../typings",
+
+  "typeCheckingMode": "strict",
+  "reportImplicitOverride": "error",
+  "reportMissingImports": true,
+  "reportMissingTypeStubs": true,
+
+  "pythonVersion": "3.8",
+  "pythonPlatform": "Windows",
+
+  "executionEnvironments": [
+    {
+      "root": ".."
+    }
+  ]
+}
diff --git a/.github/type_check.py b/.github/type_check.py
new file mode 100644
index 00000000..90d41722
--- /dev/null
+++ b/.github/type_check.py
@@ -0,0 +1,15 @@
+from pathlib import Path
+import subprocess
+
+config = Path(__file__).parent / "pyright-config.json"
+
+command = ("pyright", "-p", str(config))
+print(" ".join(command))
+
+try:
+    result = subprocess.run(command)
+except FileNotFoundError as e:
+    print(f"{e} - Is pyright installed?")
+    exit(1)
+
+exit(result.returncode)
diff --git a/.github/workflows/strict-type-check.yml b/.github/workflows/strict-type-check.yml
new file mode 100644
index 00000000..bafd572a
--- /dev/null
+++ b/.github/workflows/strict-type-check.yml
@@ -0,0 +1,33 @@
+name: type check
+
+on:
+  pull_request:
+    paths:
+      - "**.py"
+      - ".github/pyright-config.json"
+      - ".github/workflows/strict-type-check.yml"
+      - "**.pyi"
+  push:
+    paths:
+      - "**.py"
+      - ".github/pyright-config.json"
+      - ".github/workflows/strict-type-check.yml"
+      - "**.pyi"
+
+jobs:
+  pyright:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: "Install dependencies"
+        run: |
+          python -m pip install --upgrade pip pyright==1.1.358
+          python ModuleUpdate.py --append "WebHostLib/requirements.txt" --force --yes
+
+      - name: "pyright: strict check on specific files"
+        run: python .github/type_check.py
diff --git a/ModuleUpdate.py b/ModuleUpdate.py
index c3dc8c8a..ed041bef 100644
--- a/ModuleUpdate.py
+++ b/ModuleUpdate.py
@@ -70,7 +70,7 @@ def install_pkg_resources(yes=False):
         subprocess.call([sys.executable, "-m", "pip", "install", "--upgrade", "setuptools"])
 
 
-def update(yes=False, force=False):
+def update(yes: bool = False, force: bool = False) -> None:
     global update_ran
     if not update_ran:
         update_ran = True
diff --git a/typings/kivy/uix/widget.pyi b/typings/kivy/uix/widget.pyi
index 54e3b781..bf736fae 100644
--- a/typings/kivy/uix/widget.pyi
+++ b/typings/kivy/uix/widget.pyi
@@ -1,7 +1,7 @@
 """ FillType_* is not a real kivy type - just something to fill unknown typing. """
 
 from typing import Any, Optional, Protocol
-from ..graphics import FillType_Drawable, FillType_Vec
+from ..graphics.texture import FillType_Drawable, FillType_Vec
 
 
 class FillType_BindCallback(Protocol):
diff --git a/worlds/LauncherComponents.py b/worlds/LauncherComponents.py
index 41c0bb83..78ec14b4 100644
--- a/worlds/LauncherComponents.py
+++ b/worlds/LauncherComponents.py
@@ -64,7 +64,7 @@ class SuffixIdentifier:
     def __init__(self, *args: str):
         self.suffixes = args
 
-    def __call__(self, path: str):
+    def __call__(self, path: str) -> bool:
         if isinstance(path, str):
             for suffix in self.suffixes:
                 if path.endswith(suffix):