diff --git a/project.clj b/project.clj
index bd8453b..347aec3 100644
--- a/project.clj
+++ b/project.clj
@@ -1,6 +1,6 @@
 (def jetty-version "12.0.10")
 
-(defproject info.sunng/ring-jetty9-adapter "0.33.3"
+(defproject info.sunng/ring-jetty9-adapter "0.33.4-SNAPSHOT"
   :description "Ring adapter for jetty9, which supports websocket and spdy"
   :url "http://github.com/sunng87/ring-jetty9-adapter"
   :license {:name "Eclipse Public License"