diff --git a/fastapi-gunicorn/serve_http.py b/fastapi-gunicorn/serve_http.py
index 9f93f25..9da1ccd 100644
--- a/fastapi-gunicorn/serve_http.py
+++ b/fastapi-gunicorn/serve_http.py
@@ -2,8 +2,8 @@
 from datetime import datetime
 from importlib import import_module
 from logging import getLogger
-from typing import Optional
 from os import getenv
+from typing import Optional
 from uuid import UUID
 
 from bedrock_client.bedrock.model import BaseModel
@@ -108,7 +108,6 @@ async def get_metrics(request: Request):
     await middleware(request)
 
     body, content_type = request.app.monitor.export_http(
-        params=dict(request.query_params),
-        headers=request.headers,
+        params=dict(request.query_params), headers=request.headers
     )
     return Response(body, media_type=content_type)
diff --git a/flask-gunicorn-gpu/serve_http.py b/flask-gunicorn-gpu/serve_http.py
index 0e7f23c..ba4234c 100644
--- a/flask-gunicorn-gpu/serve_http.py
+++ b/flask-gunicorn-gpu/serve_http.py
@@ -101,18 +101,15 @@ def predict():
 def explain(target):
     if not callable(getattr(current_app.model, "explain", None)):
         return "Model does not implement 'explain' method", 501
-    features = current_app.model.pre_process(
-        http_body=request.data, files=request.files
-    )
+    features = current_app.model.pre_process(http_body=request.data, files=request.files)
     return current_app.model.explain(features=features, target=target)[0]
 
 
 @app.route("/metrics", methods=["GET"])
 def get_metrics():
-    """Returns real time feature values recorded by Prometheus
-    """
+    """Returns real time feature values recorded by Prometheus"""
     body, content_type = current_app.monitor.export_http(
-        params=request.args.to_dict(flat=False), headers=request.headers,
+        params=request.args.to_dict(flat=False), headers=request.headers
     )
     return Response(body, content_type=content_type)
 
diff --git a/flask-gunicorn/serve_http.py b/flask-gunicorn/serve_http.py
index 0e7f23c..ba4234c 100644
--- a/flask-gunicorn/serve_http.py
+++ b/flask-gunicorn/serve_http.py
@@ -101,18 +101,15 @@ def predict():
 def explain(target):
     if not callable(getattr(current_app.model, "explain", None)):
         return "Model does not implement 'explain' method", 501
-    features = current_app.model.pre_process(
-        http_body=request.data, files=request.files
-    )
+    features = current_app.model.pre_process(http_body=request.data, files=request.files)
     return current_app.model.explain(features=features, target=target)[0]
 
 
 @app.route("/metrics", methods=["GET"])
 def get_metrics():
-    """Returns real time feature values recorded by Prometheus
-    """
+    """Returns real time feature values recorded by Prometheus"""
     body, content_type = current_app.monitor.export_http(
-        params=request.args.to_dict(flat=False), headers=request.headers,
+        params=request.args.to_dict(flat=False), headers=request.headers
     )
     return Response(body, content_type=content_type)
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index c5000c7..05604ab 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,3 +2,5 @@ black
 flake8
 isort
 mypy
+types-Flask
+types-Werkzeug
diff --git a/style.sh b/style.sh
index 6cd9f59..a812c68 100755
--- a/style.sh
+++ b/style.sh
@@ -18,10 +18,10 @@ while getopts 'cf:' flag; do
 done
 
 if [ -z "$check" ]; then
-    isort "$files" --check --diff
+    isort --profile black "$files" --check-only --diff
     black "$files" --check
 else
-    isort "$files"
+    isort --profile black "$files"
     black "$files"
 fi
 
diff --git a/tests/lightgbm/model-server/requirements.txt b/tests/lightgbm/model-server/requirements.txt
index 53bf3d3..b9ec155 100644
--- a/tests/lightgbm/model-server/requirements.txt
+++ b/tests/lightgbm/model-server/requirements.txt
@@ -1,3 +1,3 @@
-bdrk==0.7.2
+bdrk==0.8.2
 boxkite==0.0.4
 lightgbm==2.3.1
diff --git a/tests/test_e2e.py b/tests/test_e2e.py
index a7eebe2..4155baa 100644
--- a/tests/test_e2e.py
+++ b/tests/test_e2e.py
@@ -81,9 +81,7 @@ def test_sentiment(self):
             after = get_inference_count(resp.text)
             self.assertEqual(after - before, 4)
 
-    @skipIf(
-        getenv("MODEL", None) not in MODELS["churn"], "post body for churn prediction models",
-    )
+    @skipIf(getenv("MODEL", None) not in MODELS["churn"], "post body for churn prediction models")
     def test_post(self):
         with Session() as s:
             resp = s.get(f"{self.url}/metrics")
diff --git a/tests/tf-vision/model-server/requirements.txt b/tests/tf-vision/model-server/requirements.txt
index fe636ee..c945604 100644
--- a/tests/tf-vision/model-server/requirements.txt
+++ b/tests/tf-vision/model-server/requirements.txt
@@ -1,3 +1,3 @@
 tensorflow_hub==0.6.0
 tensorflow==2.5.0
-Pillow==8.1.1
+Pillow==8.2.0