diff --git a/bench/asgi_wsgi/flask-wsgi.py b/bench/asgi_wsgi/flask-wsgi.py
index 00c6f8d..84cb118 100644
--- a/bench/asgi_wsgi/flask-wsgi.py
+++ b/bench/asgi_wsgi/flask-wsgi.py
@@ -1,12 +1,15 @@
-from flask import Flask
+from flask import Flask, make_response
 from socketify import WSGI
 
 app = Flask(__name__)
 
 @app.route('/')
 def index():
-    return 'Hello, World!'
+    """Test 6: Plaintext"""
+    response = make_response(b"Hello, World!")
+    response.content_type = "text/plain"
+    return response
 
-def run_app():
-    WSGI(app, request_response_factory_max_itens=200_000).listen(8000, lambda config: print(f"Listening on port http://localhost:{config.port} now\n")).run()
+
+WSGI(app).listen(8000, lambda config: print(f"Listening on port http://localhost:{config.port} now\n")).run()
 
diff --git a/src/socketify/asgi.py b/src/socketify/asgi.py
index 8c458c0..8b2c8dc 100644
--- a/src/socketify/asgi.py
+++ b/src/socketify/asgi.py
@@ -286,10 +286,12 @@ class ASGIWebSocket:
 
 def write_header(ssl, res, key, value):
     if isinstance(key, str):
-        if key == "content-length": return #auto
+        if key.lower() == "content-length": return #auto
+        if key.lower() == "transfer-encoding": return #auto
         key_data = key.encode("utf-8")
     elif isinstance(key, bytes):
-        if key == b'content-length': return #auto
+        if key.lower() == b'content-length': return #auto
+        if key.lower() == b'transfer-encoding': return #auto
         key_data = key
 
     if isinstance(value, int):
diff --git a/src/socketify/wsgi.py b/src/socketify/wsgi.py
index 12a3fb1..f737679 100644
--- a/src/socketify/wsgi.py
+++ b/src/socketify/wsgi.py
@@ -45,10 +45,12 @@ def write_status(ssl, res, status_text):
 
 def write_header(ssl, res, key, value):
     if isinstance(key, str):
-        if key == "content-length": return #auto
+        if key.lower() == "content-length": return #auto
+        if key.lower() == "transfer-encoding": return #auto
         key_data = key.encode("utf-8")
     elif isinstance(key, bytes):
-        if key == b'content-length': return #auto
+        if key.lower() == b'content-length': return #auto
+        if key.lower() == b'transfer-encoding': return #auto
         key_data = key
 
     if isinstance(value, int):