diff --git a/examples/player/main.py b/examples/player/main.py
index 1c1c0dd..0b123fc 100644
--- a/examples/player/main.py
+++ b/examples/player/main.py
@@ -5,6 +5,7 @@ import subprocess
 import time
 
 import requests
+from requests.structures import CaseInsensitiveDict
 
 from librespot.audio.decoders import AudioQuality, VorbisOnlyAudioQuality
 from librespot.core import Session
@@ -66,7 +67,7 @@ def client():
                     "q": cmd[2:],
                     "type": "track"
                 },
-                headers={"Authorization": "Bearer %s" % token},
+                headers=CaseInsensitiveDict({"Authorization": "Bearer %s" % token}),
             )
             i = 1
             tracks = resp.json()["tracks"]["items"]
diff --git a/examples/server/main.py b/examples/server/main.py
index 1f707bd..f31e528 100644
--- a/examples/server/main.py
+++ b/examples/server/main.py
@@ -2,6 +2,7 @@ import os
 import re
 import socket
 import threading
+from requests.structures import CaseInsensitiveDict
 
 from librespot.audio.decoders import AudioQuality, VorbisOnlyAudioQuality
 from librespot.core import Session
@@ -23,7 +24,7 @@ def handler(client: socket.socket, address: str):
     req_method = req_http_arr[0]
     req_uri = req_http_arr[1]
     req_http_version = req_http_arr[2]
-    req_header = {}
+    req_header = CaseInsensitiveDict()
     for header in req_header_str.split(b"\r\n"):
         try:
             key, value = header.split(b": ")
@@ -73,7 +74,7 @@ def main():
         threading.Thread(target=handler, args=sock.accept()).start()
 
 
-def response(client: socket.socket, uri: str, header: dict,
+def response(client: socket.socket, uri: str, header: CaseInsensitiveDict,
              body: bytes) -> tuple[str, list, bytes, bool]:
     if re.search(r"^/audio/track/([0-9a-zA-Z]{22})$", uri) is not None:
         track_id_search = re.search(
diff --git a/librespot/audio/__init__.py b/librespot/audio/__init__.py
index 97c9282..3d10a6f 100644
--- a/librespot/audio/__init__.py
+++ b/librespot/audio/__init__.py
@@ -8,6 +8,7 @@ from librespot.crypto import Packet
 from librespot.metadata import EpisodeId, PlayableId, TrackId
 from librespot.proto import Metadata_pb2 as Metadata, StorageResolve_pb2 as StorageResolve
 from librespot.structure import AudioDecrypt, AudioQualityPicker, Closeable, FeederException, GeneralAudioStream, GeneralWritableStream, HaltListener, NoopAudioDecrypt, PacketsReceiver
+from requests.structures import CaseInsensitiveDict
 import concurrent.futures
 import io
 import logging
@@ -471,9 +472,9 @@ class CdnManager:
 
     class InternalResponse:
         buffer: bytes
-        headers: typing.Dict[str, str]
+        headers: CaseInsensitiveDict[str, str]
 
-        def __init__(self, buffer: bytes, headers: typing.Dict[str, str]):
+        def __init__(self, buffer: bytes, headers: CaseInsensitiveDict[str, str]):
             self.buffer = buffer
             self.headers = headers
 
@@ -578,8 +579,6 @@ class CdnManager:
             response = self.request(range_start=0,
                                     range_end=ChannelManager.chunk_size - 1)
             content_range = response.headers.get("Content-Range")
-            if content_range is None:
-                content_range = response.headers.get("content-range")
             if content_range is None:
                 raise IOError("Missing Content-Range header!")
             split = content_range.split("/")
@@ -633,16 +632,16 @@ class CdnManager:
                 range_end = (chunk + 1) * ChannelManager.chunk_size - 1
             response = self.__session.client().get(
                 self.__cdn_url.url,
-                headers={
+                headers=CaseInsensitiveDict({
                     "Range": "bytes={}-{}".format(range_start, range_end)
-                },
+                }),
             )
             if response.status_code != 206:
                 raise IOError(response.status_code)
             body = response.content
             if body is None:
                 raise IOError("Response body is empty!")
-            return CdnManager.InternalResponse(body, dict(response.headers))
+            return CdnManager.InternalResponse(body, response.headers)
 
         class InternalStream(AbsChunkedInputStream):
             streamer: CdnManager.Streamer
diff --git a/librespot/core.py b/librespot/core.py
index 893d0a0..91dc51c 100644
--- a/librespot/core.py
+++ b/librespot/core.py
@@ -28,6 +28,7 @@ from Cryptodome.Hash import SHA1
 from Cryptodome.Protocol.KDF import PBKDF2
 from Cryptodome.PublicKey import RSA
 from Cryptodome.Signature import PKCS1_v1_5
+from requests.structures import CaseInsensitiveDict
 
 from librespot import util
 from librespot import Version
@@ -80,7 +81,7 @@ class ApiClient(Closeable):
         self,
         method: str,
         suffix: str,
-        headers: typing.Union[None, typing.Dict[str, str]],
+        headers: typing.Union[None, CaseInsensitiveDict[str, str]],
         body: typing.Union[None, bytes],
         url: typing.Union[None, str],
     ) -> requests.PreparedRequest:
@@ -89,7 +90,7 @@ class ApiClient(Closeable):
         :param method: str:
         :param suffix: str:
         :param headers: typing.Union[None:
-        :param typing.Dict[str:
+        :param CaseInsensitiveDict[str:
         :param str]]:
         :param body: typing.Union[None:
         :param bytes]:
@@ -106,7 +107,7 @@ class ApiClient(Closeable):
         request = requests.PreparedRequest()
         request.method = method
         request.data = body
-        request.headers = {}
+        request.headers = CaseInsensitiveDict()
         if headers is not None:
             request.headers = headers
         request.headers["Authorization"] = "Bearer {}".format(
@@ -122,7 +123,7 @@ class ApiClient(Closeable):
         self,
         method: str,
         suffix: str,
-        headers: typing.Union[None, typing.Dict[str, str]],
+        headers: typing.Union[None, CaseInsensitiveDict[str, str]],
         body: typing.Union[None, bytes],
     ) -> requests.Response:
         """
@@ -130,7 +131,7 @@ class ApiClient(Closeable):
         :param method: str:
         :param suffix: str:
         :param headers: typing.Union[None:
-        :param typing.Dict[str:
+        :param CaseInsensitiveDict[str:
         :param str]]:
         :param body: typing.Union[None:
         :param bytes]:
@@ -145,7 +146,7 @@ class ApiClient(Closeable):
         method: str,
         url: str,
         suffix: str,
-        headers: typing.Union[None, typing.Dict[str, str]],
+        headers: typing.Union[None, CaseInsensitiveDict[str, str]],
         body: typing.Union[None, bytes],
     ) -> requests.Response:
         """
@@ -154,7 +155,7 @@ class ApiClient(Closeable):
         :param url: str:
         :param suffix: str:
         :param headers: typing.Union[None:
-        :param typing.Dict[str:
+        :param CaseInsensitiveDict[str:
         :param str]]:
         :param body: typing.Union[None:
         :param bytes]:
@@ -327,10 +328,10 @@ class ApiClient(Closeable):
         resp = requests.post(
             "https://clienttoken.spotify.com/v1/clienttoken",
             proto_req.SerializeToString(),
-            headers={
+            headers=CaseInsensitiveDict({
                 "Accept": "application/x-protobuf",
                 "Content-Encoding": "",
-            },
+            }),
         )
 
         ApiClient.StatusCodeException.check_status(resp)
@@ -604,10 +605,10 @@ class DealerClient(Closeable):
                 return
             self.__message_listeners_lock.wait()
 
-    def __get_headers(self, obj: typing.Any) -> dict[str, str]:
+    def __get_headers(self, obj: typing.Any) -> CaseInsensitiveDict[str, str]:
         headers = obj.get("headers")
         if headers is None:
-            return {}
+            return CaseInsensitiveDict()
         return headers
 
     class ConnectionHolder(Closeable):
@@ -1212,12 +1213,12 @@ class Session(Closeable, MessageListener, SubListener):
             raise RuntimeError("Session isn't authenticated!")
         return self.__mercury_client
 
-    def on_message(self, uri: str, headers: typing.Dict[str, str],
+    def on_message(self, uri: str, headers: CaseInsensitiveDict[str, str],
                    payload: bytes):
         """
 
         :param uri: str:
-        :param headers: typing.Dict[str:
+        :param headers: CaseInsensitiveDict[str:
         :param str]:
         :param payload: bytes:
 
@@ -2331,10 +2332,10 @@ class TokenProvider:
             response = requests.post(
                 "https://login5.spotify.com/v3/login",
                 data=login5_request.SerializeToString(),
-                headers={
+                headers=CaseInsensitiveDict({
                     "Content-Type": "application/x-protobuf",
                     "Accept": "application/x-protobuf"
-                    })
+                    }))
 
             if response.status_code == 200:
                 login5_response = Login5.LoginResponse()
diff --git a/librespot/mercury.py b/librespot/mercury.py
index 450b98f..6084d28 100644
--- a/librespot/mercury.py
+++ b/librespot/mercury.py
@@ -3,6 +3,7 @@ from librespot import util
 from librespot.crypto import Packet
 from librespot.proto import Mercury_pb2 as Mercury, Pubsub_pb2 as Pubsub
 from librespot.structure import Closeable, PacketsReceiver, SubListener
+from requests.structures import CaseInsensitiveDict
 import io
 import json
 import logging
@@ -346,11 +347,11 @@ class RawMercuryRequest:
         return RawMercuryRequest.Builder()
 
     class Builder:
-        header_dict: dict
+        header_dict: CaseInsensitiveDict
         payload: typing.List[bytes]
 
         def __init__(self):
-            self.header_dict = {}
+            self.header_dict = CaseInsensitiveDict()
             self.payload = []
 
         def set_uri(self, uri: str):
diff --git a/librespot/structure.py b/librespot/structure.py
index 9171ada..4e18c73 100644
--- a/librespot/structure.py
+++ b/librespot/structure.py
@@ -8,6 +8,7 @@ if typing.TYPE_CHECKING:
     from librespot.crypto import Packet
     from librespot.mercury import MercuryClient
     from librespot.proto import Metadata_pb2 as Metadata
+    from requests.structures import CaseInsensitiveDict
 
 
 class AudioDecrypt:
@@ -61,7 +62,7 @@ class HaltListener:
 
 
 class MessageListener:
-    def on_message(self, uri: str, headers: typing.Dict[str, str],
+    def on_message(self, uri: str, headers: CaseInsensitiveDict[str, str],
                    payload: bytes):
         raise NotImplementedError
 
diff --git a/librespot/zeroconf.py b/librespot/zeroconf.py
index afe6847..e2277bb 100644
--- a/librespot/zeroconf.py
+++ b/librespot/zeroconf.py
@@ -7,6 +7,7 @@ from librespot.core import Session
 from librespot.crypto import DiffieHellman
 from librespot.proto import Connect_pb2 as Connect
 from librespot.structure import Closeable, Runnable, SessionListener
+from requests.structures import CaseInsensitiveDict
 import base64
 import concurrent.futures
 import copy
@@ -275,7 +276,7 @@ class ZeroconfServer(Closeable):
             method = request_line[0].decode()
             path = request_line[1].decode()
             http_version = request_line[2].decode()
-            headers = {}
+            headers = CaseInsensitiveDict()
             while True:
                 header = request.readline().strip()
                 if not header:
diff --git a/librespot_player/__init__.py b/librespot_player/__init__.py
index 630986e..0dc6b7c 100644
--- a/librespot_player/__init__.py
+++ b/librespot_player/__init__.py
@@ -5,6 +5,7 @@ from librespot.core import Session
 from librespot.mercury import MercuryRequests
 from librespot.proto import Connect_pb2 as Connect
 from librespot.structure import Closeable, MessageListener, RequestListener
+from requests.structures import CaseInsensitiveDict
 import concurrent.futures
 import logging
 import typing
@@ -200,6 +201,6 @@ class StateWrapper(MessageListener):
             "hm://collection/collection/" + session.username() + "/json"
         ])
 
-    def on_message(self, uri: str, headers: typing.Dict[str, str],
+    def on_message(self, uri: str, headers: CaseInsensitiveDict[str, str],
                    payload: bytes):
         pass