diff --git a/examples/add_models.py b/examples/add_models.py
index 3bb24500..a69b863d 100644
--- a/examples/add_models.py
+++ b/examples/add_models.py
@@ -1,3 +1,5 @@
+import logging
+
 import flama
 from flama import Flama, Route
 
@@ -7,13 +9,13 @@ class AppStatus:
 
 
 async def startup():
-    print("\nStarting up the ML API...\n")
+    logging.info("\nStarting up the ML API...\n")
     # Here, whatever action we want to be run at the startup of the application
     AppStatus.loaded = True
 
 
 async def shutdown():
-    print("\nShutting down the ML API...\n")
+    logging.info("\nShutting down the ML API...\n")
     # Here, whatever action we want to be run at the shutdown of the application
 
 
diff --git a/flama/authentication/components.py b/flama/authentication/components.py
index 0f021541..037a50b8 100644
--- a/flama/authentication/components.py
+++ b/flama/authentication/components.py
@@ -21,7 +21,6 @@ def __init__(self, secret: bytes, *, header_key: str, header_prefix: str, cookie
         self.cookie_key = cookie_key
 
     def _token_from_cookies(self, cookies: Cookies) -> bytes:
-        print(f"ERROR: {cookies}")
         try:
             token = cookies[self.cookie_key]["value"]
         except KeyError:
@@ -31,7 +30,6 @@ def _token_from_cookies(self, cookies: Cookies) -> bytes:
         return token.encode()
 
     def _token_from_header(self, headers: Headers) -> bytes:
-        print(f"ERROR: {headers}")
         try:
             header_prefix, token = headers[self.header_key].split()
         except KeyError:
diff --git a/flama/http.py b/flama/http.py
index 79705154..97909bde 100644
--- a/flama/http.py
+++ b/flama/http.py
@@ -72,14 +72,12 @@ async def __call__(  # type: ignore[override]
 
 class EnhancedJSONEncoder(json.JSONEncoder):
     def default(self, o):
-        if isinstance(o, (Path, os.PathLike)):
+        if isinstance(o, (Path, os.PathLike, uuid.UUID)):
             return str(o)
         if isinstance(o, (bytes, bytearray)):
             return o.decode("utf-8")
         if isinstance(o, enum.Enum):
             return o.value
-        if isinstance(o, uuid.UUID):
-            return str(o)
         if isinstance(o, (set, frozenset)):
             return list(o)
         if isinstance(o, (datetime.datetime, datetime.date, datetime.time)):
diff --git a/flama/resources/crud.py b/flama/resources/crud.py
index 938c2bd7..8fd0c1c0 100644
--- a/flama/resources/crud.py
+++ b/flama/resources/crud.py
@@ -194,8 +194,8 @@ async def partial_update(
             summary:
                 Partially update a resource
             description:
-                Partially update a resource in this collection. Only the specified fields will be replaced, keeping the 
-                rest, so no one is required.
+                Partially update a resource in this collection. Only the specified fields will be replaced, keeping the
+                 rest, so no one is required.
             responses:
                 200:
                     description:
diff --git a/pyproject.toml b/pyproject.toml
index 81eef2d3..d9e0f4f5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -123,7 +123,7 @@ skip_glob = [
 [tool.ruff]
 line-length = 120
 # Enable Pyflakes and pycodestyle rules.
-select = ["E", "F"]
+select = ["C90", "E", "F", "G", "I", "W", "T"]
 ignore = ["E721"]
 exclude = [
     ".git",
diff --git a/tests/schemas/test_data_structures.py b/tests/schemas/test_data_structures.py
index 94b62eab..e04755ba 100644
--- a/tests/schemas/test_data_structures.py
+++ b/tests/schemas/test_data_structures.py
@@ -105,7 +105,9 @@ def test_json_schema(self):
 
 class TestCaseSchema:
     @pytest.fixture(scope="function")
-    def schema_type(self, app, request, foo_schema, bar_schema, bar_optional_schema, bar_list_schema, bar_dict_schema):
+    def schema_type(  # noqa: C901
+        self, app, request, foo_schema, bar_schema, bar_optional_schema, bar_list_schema, bar_dict_schema
+    ):
         if request.param is None:
             return None
         elif request.param == "bare_schema":
diff --git a/tests/schemas/test_generator.py b/tests/schemas/test_generator.py
index 2ed6dd1c..b56e143b 100644
--- a/tests/schemas/test_generator.py
+++ b/tests/schemas/test_generator.py
@@ -896,7 +896,7 @@ def schemas(self, owner_schema, puppy_schema, body_param_schema):
         return {"Owner": owner_schema, "Puppy": puppy_schema, "BodyParam": body_param_schema}
 
     @pytest.fixture(scope="function", autouse=True)
-    def add_endpoints(self, app, puppy_schema, body_param_schema):
+    def add_endpoints(self, app, puppy_schema, body_param_schema):  # noqa: C901
         @app.route("/endpoint/", methods=["GET"])
         class PuppyEndpoint(HTTPEndpoint):
             async def get(self) -> types.Schema[puppy_schema.schema]: