diff --git a/aiocometd/_metadata.py b/aiocometd/_metadata.py
index d7707d1..5660acb 100644
--- a/aiocometd/_metadata.py
+++ b/aiocometd/_metadata.py
@@ -3,6 +3,6 @@
 DESCRIPTION = "CometD client for asyncio"
 KEYWORDS = "asyncio aiohttp comet cometd bayeux push streaming"
 URL = "https://github.com/robertmrk/aiocometd"
-VERSION = "0.3.1"
+VERSION = "0.4.0"
 AUTHOR = "Róbert Márki"
 AUTHOR_EMAIL = "gsmiko@gmail.com"