diff --git a/src/mastodon.py b/src/mastodon.py
index 0e74a62..70f3165 100644
--- a/src/mastodon.py
+++ b/src/mastodon.py
@@ -19,5 +19,5 @@ def post_media(session, media_url):
 
 def publish(session, content, media):
     media_ids = [post_media(session, url) for url in media]
-    r = session.do('post', 'api/v1/statuses', params=dict(status=content, media_ids=media_ids))
+    r = session.do('post', 'api/v1/statuses', data=dict(status=content, media_ids=media_ids))
     return r['id']