diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3018c2e..ec0bc40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.9"
-      - run: pip install riot==0.4.0
+      - run: pip install riot==0.19.0
       - run: riot -v run -s black -- --check .
   mypy:
     runs-on: ubuntu-latest
@@ -17,7 +17,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.9"
-      - run: pip install riot==0.4.0
+      - run: pip install riot==0.19.0
       - run: riot -v run mypy
   flake8:
     runs-on: ubuntu-latest
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.9"
-      - run: pip install riot==0.4.0
+      - run: pip install riot==0.19.0
       - run: riot -v run flake8
   test:
     strategy:
@@ -41,12 +41,23 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: install riot
-        run: pip install riot==0.4.0
+        run: pip install riot==0.19.0
       - name: run tests
         run: riot -v run --python=${{ matrix.python-version }} test -- --cov=asyncio_connection_pool --cov-branch --cov-config=.coveragerc
+      - name: install coverage
+        run: pip install coverage
       - name: upload coverage
-        run: pip install coveralls && coveralls
-        env:
-          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
-      - name: print coverage
-        run: pip install coverage && coverage report
+        uses: coverallsapp/github-action@v2
+        with:
+          parallel: true
+          flag-name: run ${{ join(matrix.*, ' - ') }}
+  finish-coveralls:
+    needs: test
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@v2
+        with:
+          parallel-finished: true
+          allow-empty: true
diff --git a/asyncio_connection_pool/__init__.py b/asyncio_connection_pool/__init__.py
index 62fcb98..025f41c 100644
--- a/asyncio_connection_pool/__init__.py
+++ b/asyncio_connection_pool/__init__.py
@@ -10,7 +10,7 @@
 
 class ConnectionStrategy(ABC, Generic[Conn]):
     @abstractmethod
-    async def make_connection(self) -> Awaitable[Conn]:
+    async def make_connection(self) -> Conn:
         ...
 
     @abstractmethod
@@ -61,7 +61,7 @@ def __init__(
         strategy: ConnectionStrategy[Conn],
         max_size: int,
         burst_limit: Optional[int] = None
-    ):
+    ) -> None:
         self._loop = asyncio.get_event_loop()
         self.strategy = strategy
         self.max_size = max_size
@@ -82,7 +82,7 @@ def _waiters(self) -> int:
         waiters = self.available._getters  # type: ignore
         return sum(not (w.done() or w.cancelled()) for w in waiters)
 
-    async def _connection_maker(self):
+    async def _connection_maker(self) -> Conn:
         try:
             conn = await self.strategy.make_connection()
         finally:
@@ -90,12 +90,12 @@ async def _connection_maker(self):
         self.in_use += 1
         return conn
 
-    async def _connection_waiter(self):
+    async def _connection_waiter(self) -> Conn:
         conn = await self.available.get()
         self.in_use += 1
         return conn
 
-    def _get_conn(self) -> "Awaitable[Conn]":
+    def _get_conn(self) -> Awaitable[Conn]:
         # This function is how we avoid explicitly locking. Since it is
         # synchronous, we do all the "book-keeping" required to get a
         # connection synchronously, and return a Future or Task which can be
@@ -132,7 +132,7 @@ def _get_conn(self) -> "Awaitable[Conn]":
             return self._loop.create_task(self._connection_waiter())
 
     @asynccontextmanager
-    async def get_connection(self) -> AsyncIterator[Conn]:  # type: ignore
+    async def get_connection(self) -> AsyncIterator[Conn]:
         # _get_conn atomically does any book-keeping and returns an awaitable
         # that resolves to a connection.
         conn = await self._get_conn()
diff --git a/asyncio_connection_pool/contrib/datadog.py b/asyncio_connection_pool/contrib/datadog.py
index 2b96843..e8438fe 100644
--- a/asyncio_connection_pool/contrib/datadog.py
+++ b/asyncio_connection_pool/contrib/datadog.py
@@ -122,7 +122,7 @@ def _get_conn(self):
         return super()._get_conn()
 
     @asynccontextmanager
-    async def get_connection(self) -> AsyncIterator[Conn]:  # type: ignore
+    async def get_connection(self) -> AsyncIterator[Conn]:
         async with AsyncExitStack() as stack:
             self._record_connection_acquiring(1)
             try:
diff --git a/riotfile.py b/riotfile.py
index 0a0c4d5..215be63 100644
--- a/riotfile.py
+++ b/riotfile.py
@@ -4,12 +4,12 @@
     pys=3,
     venvs=[
         Venv(
-            pys=["3.8", "3.9", "3.10"],
+            pys=["3.8", "3.9", "3.10", "3.11", "3.12"],
             name="test",
             command="pytest {cmdargs}",
             pkgs={
-                "pytest": "==6.2.5",
-                "pytest-asyncio": "==0.16.0",
+                "pytest": latest,
+                "pytest-asyncio": latest,
                 "pytest-cov": latest,
                 # extras_require
                 "ddtrace": latest,
@@ -21,11 +21,11 @@
             name="mypy",
             command="mypy asyncio_connection_pool",
             pkgs={
-                "mypy": "==0.790",
+                "mypy": "==1.1.1",
             },
         ),
         Venv(
-            pkgs={"black": "==22.3.0"},
+            pkgs={"black": "==23.1.0"},
             venvs=[
                 Venv(
                     name="fmt",
@@ -39,7 +39,7 @@
         ),
         Venv(
             name="flake8",
-            pkgs={"flake8": "==3.8.4"},
+            pkgs={"flake8": "==6.0.0"},
             command="flake8 test asyncio_connection_pool",
         ),
     ],