diff --git a/src/matrix/net/HomeServerApi.js b/src/matrix/net/HomeServerApi.js
index 1f2acab4..bdf35363 100644
--- a/src/matrix/net/HomeServerApi.js
+++ b/src/matrix/net/HomeServerApi.js
@@ -222,7 +222,7 @@ export class HomeServerApi {
     }
 
     uploadAttachment(blob, filename, options = null) {
-        return this._post("/upload", {filename}, blob, options);
+        return this._authedRequest("POST", `${this._homeserver}/_matrix/media/r0/upload`, {filename}, blob, options);
     }
 }