diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..0129b56
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    name: Test (Python ${{ matrix.python }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ["3.10", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python }}
+      - run: pip install -e ".[dev]"
+      - name: Type-check
+        run: mypy livexface
+      - name: Test
+        run: pytest -q tests
diff --git a/livexface/client.py b/livexface/client.py
index 0ec09bc..2677878 100644
--- a/livexface/client.py
+++ b/livexface/client.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import builtins
 import json
 from pathlib import Path
 from typing import Any, IO, Sequence, Union
@@ -291,7 +292,7 @@ def compare(
     def batch_register(
         self,
         collection_id: str,
-        items: list[dict[str, Any]],
+        items: builtins.list[dict[str, Any]],
     ) -> BatchResponse:
         """
         Batch register up to 20 faces in a single request.
@@ -308,7 +309,7 @@ def batch_register(
             ])
         """
         files: dict[str, Any] = {}
-        entries = []
+        entries: builtins.list[dict[str, Any]] = []
         for i, item in enumerate(items):
             fname, fbytes, ftype = _to_bytes_tuple(item["image"])
             files[f"images[{i}]"] = (fname, fbytes, ftype)
@@ -327,7 +328,7 @@ def batch_register(
         )
         return BatchResponse.from_dict(resp)
 
-    def batch_delete(self, collection_id: str, face_ids: list[str]) -> BatchDeleteResponse:
+    def batch_delete(self, collection_id: str, face_ids: builtins.list[str]) -> BatchDeleteResponse:
         """Batch delete up to 100 faces by their IDs."""
         resp = self._c._request(
             "DELETE",
@@ -349,7 +350,7 @@ def attributes(self, collection_id: str, image: ImageInput) -> AttributesResult:
     def batch_register_async(
         self,
         collection_id: str,
-        items: list[dict[str, Any]],
+        items: builtins.list[dict[str, Any]],
     ) -> BatchJob:
         """
         Submit up to 100 faces for asynchronous registration. Returns a job
@@ -361,7 +362,7 @@ def batch_register_async(
         :meth:`active_liveness`) are also supported.
         """
         files: dict[str, Any] = {}
-        entries = []
+        entries: builtins.list[dict[str, Any]] = []
         for i, item in enumerate(items):
             fname, fbytes, ftype = _to_bytes_tuple(item["image"])
             files[f"images[{i}]"] = (fname, fbytes, ftype)