diff --git a/tootbot.py b/tootbot.py
index cd4f4dc..e59bafa 100755
--- a/tootbot.py
+++ b/tootbot.py
@@ -167,10 +167,11 @@ if source[:4] == 'http':
             if 'links' in t:
                 for l in t.links:
                     if l.type in ('image/gif', 'image/jpg', 'image/png', 'image/webp'):
-                        media = requests.get(l.url)
-                        media_posted = mastodon_api.media_post(
-                            media.content, mime_type=media.headers.get('content-type'))
-                        toot_media.append(media_posted['id'])
+                        media = requests.get(l.url, headers = {'User-agent': 'Mozilla/5.0'})
+                        if media.status_code == 200:
+                            media_posted = mastodon_api.media_post(
+                                media.content, mime_type=media.headers.get('content-type'))
+                            toot_media.append(media_posted['id'])
 
             # replace short links by original URL
             m = re.search(r"http[^ \xa0]*", c)