diff --git a/aiozipkin/aiohttp_helpers.py b/aiozipkin/aiohttp_helpers.py
index 8b25969a..b36ff8d3 100644
--- a/aiozipkin/aiohttp_helpers.py
+++ b/aiozipkin/aiohttp_helpers.py
@@ -317,7 +317,6 @@ async def on_request_exception(
         context: SimpleNamespace,
         params: TraceRequestExceptionParams,
     ) -> None:
-
         span_context = self._get_span_context(context)
         if span_context is None:
             return
diff --git a/aiozipkin/context_managers.py b/aiozipkin/context_managers.py
index d9f28326..6ec111ab 100644
--- a/aiozipkin/context_managers.py
+++ b/aiozipkin/context_managers.py
@@ -28,7 +28,6 @@ class _Base(Generic[T], AsyncContextManager, AbcAwaitable):
 
 
 class _ContextManager(_Base[T]):
-
     __slots__ = ("_coro", "_obj")
 
     def __init__(self, coro: Awaitable[T]) -> None:
diff --git a/aiozipkin/transport.py b/aiozipkin/transport.py
index 671b43fc..80eeab2e 100644
--- a/aiozipkin/transport.py
+++ b/aiozipkin/transport.py
@@ -14,7 +14,7 @@
 
 
 DEFAULT_TIMEOUT = aiohttp.ClientTimeout(total=5 * 60)
-BATCHES_MAX_COUNT = 10 ** 4
+BATCHES_MAX_COUNT = 10**4
 
 DataList = List[Dict[str, Any]]
 SndBatches = Deque[Tuple[int, DataList]]
@@ -157,7 +157,6 @@ def send(self, record: Record) -> None:
 
     async def _send_data(self, data: DataList) -> bool:
         try:
-
             async with self._session.post(self._address, json=data) as resp:
                 body = await resp.text()
                 if resp.status >= 300:
diff --git a/examples/microservices/service_a.py b/examples/microservices/service_a.py
index 5de16fb6..1ecc19ac 100644
--- a/examples/microservices/service_a.py
+++ b/examples/microservices/service_a.py
@@ -38,7 +38,6 @@ async def handler(request):
 
 
 async def make_app():
-
     app = web.Application()
     app.router.add_get("/api/v1/data", handler)
     app.router.add_get("/", handler)
diff --git a/setup.py b/setup.py
index 4aebb3aa..636b3abe 100644
--- a/setup.py
+++ b/setup.py
@@ -5,10 +5,6 @@
 from setuptools import find_packages, setup  # type: ignore
 
 
-if sys.version_info < (3, 6, 0):
-    raise RuntimeError("aiozipkin does not support Python earlier than 3.6.0")
-
-
 def read(f: str) -> str:
     return open(os.path.join(os.path.dirname(__file__), f)).read().strip()
 
diff --git a/tests/test_tracer.py b/tests/test_tracer.py
index a7617891..221998cc 100644
--- a/tests/test_tracer.py
+++ b/tests/test_tracer.py
@@ -91,7 +91,6 @@ def test_noop_span_methods(tracer: Tracer) -> Any:
 
 
 def test_trace_join_span(tracer: Tracer, context: Any) -> None:
-
     with tracer.join_span(context) as span:
         span.name("name")
 
@@ -107,7 +106,6 @@ def test_trace_join_span(tracer: Tracer, context: Any) -> None:
 
 
 def test_trace_new_child(tracer: Tracer, context: Any) -> None:
-
     with tracer.new_child(context) as span:
         span.name("name")
 
@@ -117,7 +115,6 @@ def test_trace_new_child(tracer: Tracer, context: Any) -> None:
 
 
 def test_span_new_child(tracer: Tracer, context: Any, fake_transport: Any) -> None:
-
     with tracer.new_child(context) as span:
         span.name("name")
         with span.new_child("child", "CLIENT") as child_span1:
diff --git a/tests/test_zipkin.py b/tests/test_zipkin.py
index 2cc94b7c..8ce23b13 100644
--- a/tests/test_zipkin.py
+++ b/tests/test_zipkin.py
@@ -133,7 +133,6 @@ async def test_zipkin_error(
 async def test_leak_in_transport(
     zipkin_url: str, client: aiohttp.ClientSession, loop: asyncio.AbstractEventLoop
 ) -> None:
-
     tracemalloc.start()
 
     endpoint = az.create_endpoint("simple_service")