diff --git a/twitchio/http.py b/twitchio/http.py
index 777f4332..4fbb12c6 100644
--- a/twitchio/http.py
+++ b/twitchio/http.py
@@ -460,7 +460,10 @@ def __init__(self, session: aiohttp.ClientSession = MISSING, *, client_id: str)
 
     @property
     def headers(self) -> dict[str, str]:
-        return {"User-Agent": self.user_agent, "Client-ID": self._client_id}
+        # If the user somehow gets a client_id passed that isn't a str
+        # this will allow Twitch to throw a reasonable HTTPException
+
+        return {"User-Agent": self.user_agent, "Client-ID": str(self._client_id)}
 
     async def _init_session(self) -> None:
         if self._session_set: