diff --git a/get_custom_emoji.py b/get_custom_emoji.py
index 4cf8279..b532229 100755
--- a/get_custom_emoji.py
+++ b/get_custom_emoji.py
@@ -4,7 +4,6 @@ import sys
 import os
 import re
 import json
-import mimetypes
 import urllib.request
 
 
@@ -46,12 +45,8 @@ def get_emoji_image(name, emoji_id):
 	print(f"Downloading {name}", file=sys.stderr, flush=True)
 	with mm_api_get(f"/v4/emoji/{emoji_id}/image") as upstream_response:
 		headers = {k.lower(): v for (k, v) in upstream_response.headers.items()}
-		mime = headers.get("content-type")
-		if not mime.startswith("image/"):
-			raise Exception(f"Got response with MIME type {mime}, not an image")
-		extension = mimetypes.guess_extension(mime)
 
-		filepath = f"{destination_dir}/{name}{extension}"
+		filepath = f"{destination_dir}/{name}"
 		with open(filepath, "wb") as fh:
 			chunk = upstream_response.read1()
 			while chunk != b"":