diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3831ed35..55b740b3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,3 +24,18 @@ jobs:
           pip install codecov
           codecov
         fi
+  typing:
+    name: Typing Check
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: pip install -r requirements-typing.txt
+    - name: Run mypy
+      run: mypy metar
diff --git a/metar/Metar.pyi b/metar/Metar.pyi
index b6c388fe..24e763bb 100644
--- a/metar/Metar.pyi
+++ b/metar/Metar.pyi
@@ -16,6 +16,8 @@ def _sanitize(code: str) -> str: ...
 def _report_match(handler: Callable[[dict], None], match: Match) -> None: ...
 def _unparsedGroup(self: "Metar", d: dict) -> None: ...
 
+class ParserError(Exception): ...
+
 class Metar:
     code: str
     type: Literal["METAR", "SPECI"]
diff --git a/requirements-typing.txt b/requirements-typing.txt
new file mode 100644
index 00000000..a45e2c90
--- /dev/null
+++ b/requirements-typing.txt
@@ -0,0 +1 @@
+mypy==1.3.0