diff --git a/.travis.yml b/.travis.yml
index 15834e620..9f17acf2c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ otp_release:
    - 19.0
    - 19.1
    - 19.2
+   - 20.0
 
 script: 
   - make
diff --git a/Makefile b/Makefile
index 8203004c8..3ea8fff3d 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ dep_gproc        = git https://github.com/uwiger/gproc
 dep_getopt       = git https://github.com/jcomellas/getopt v0.8.2
 dep_lager        = git https://github.com/basho/lager master
 dep_esockd       = git https://github.com/emqtt/esockd master
-dep_ekka         = git https://github.com/emqtt/ekka develop
+dep_ekka         = git https://github.com/emqtt/ekka master
 dep_mochiweb     = git https://github.com/emqtt/mochiweb master
 dep_pbkdf2       = git https://github.com/emqtt/pbkdf2 2.0.1
 dep_lager_syslog = git https://github.com/basho/lager_syslog
diff --git a/README.md b/README.md
index 6bb93dc47..0fbd3a118 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@
 # *EMQ* - Erlang MQTT Broker
 
 [![Build Status](https://travis-ci.org/emqtt/emqttd.svg?branch=master)](https://travis-ci.org/emqtt/emqttd)
-[<img src="http://slack.emqtt.io/badge.svg">](http://slack.emqtt.io)
 
 *EMQ* (Erlang MQTT Broker) is a distributed, massively scalable, highly extensible MQTT message broker written in Erlang/OTP.