diff --git a/CHANGES b/CHANGES
index d5fe72f..0cd9176 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,9 @@
+3.4.0 2017-07-27
+- add auth_chain_b
+- add initmudbjson.sh
+- allow set speed limit in runtime
+- fix bugs & mem leak
+
 3.3.3 2017-06-03
 - add DNS cache
 - add tls1.2_ticket_fastauth
diff --git a/shadowsocks/version.py b/shadowsocks/version.py
index 74eac22..f3e1ef7 100644
--- a/shadowsocks/version.py
+++ b/shadowsocks/version.py
@@ -16,5 +16,5 @@
 # under the License.
 
 def version():
-    return '3.3.3 2017-06-03'
+    return '3.4.0 2017-07-27'