diff --git a/adafruit_requests.py b/adafruit_requests.py
index 46b1780..48c54c0 100644
--- a/adafruit_requests.py
+++ b/adafruit_requests.py
@@ -50,7 +50,7 @@ def cast(_t, value):
 else:
     from ssl import SSLContext
     from types import ModuleType, TracebackType
-    from typing import Any, Dict, List, Optional, Tuple, Type, Union, cast
+    from typing import Any, Dict, Optional, Tuple, Type, Union, cast
 
     try:
         from typing import Protocol
@@ -575,7 +575,7 @@ def _send_request(
         host: str,
         method: str,
         path: str,
-        headers: List[Dict[str, str]],
+        headers: Dict[str, str],
         data: Any,
         json: Any,
     ):
@@ -623,7 +623,7 @@ def request(
         url: str,
         data: Optional[Any] = None,
         json: Optional[Any] = None,
-        headers: Optional[List[Dict[str, str]]] = None,
+        headers: Optional[Dict[str, str]] = None,
         stream: bool = False,
         timeout: float = 60,
     ) -> Response:
@@ -793,7 +793,7 @@ def request(
     url: str,
     data: Optional[Any] = None,
     json: Optional[Any] = None,
-    headers: Optional[List[Dict[str, str]]] = None,
+    headers: Optional[Dict[str, str]] = None,
     stream: bool = False,
     timeout: float = 1,
 ) -> None: