diff --git a/ChangeLog b/ChangeLog
index 5f3732babf8eb7f4bac71d1f27396f10964886a5..fb2372f7b7ff9c8b6b174adc2c0050211a7d9f50 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,5 @@
+Changes in version 0.0.12 - UNRELEASED:
+
 Changes in version 0.0.11 - 2019-06-21:
  - Update my e-mail address.
  - Change the obfs4 behavior for handling handshake failure to be more
diff --git a/obfs4proxy/obfs4proxy.go b/obfs4proxy/obfs4proxy.go
index bac1ad1ac2f7d4604132972dc0ce579364c8423a..1dd00b289970fa44212e83411c62452448c5419a 100644
--- a/obfs4proxy/obfs4proxy.go
+++ b/obfs4proxy/obfs4proxy.go
@@ -50,7 +50,7 @@ import (
 )
 
 const (
-	obfs4proxyVersion = "0.0.11"
+	obfs4proxyVersion = "0.0.12-dev"
 	obfs4proxyLogFile = "obfs4proxy.log"
 	socksAddr         = "127.0.0.1:0"
 )