From 26d7fb01ed503b3a77bfa3928fe11f967569a0ee Mon Sep 17 00:00:00 2001
From: Shao Yu Lung <bestlong168@gmail.com>
Date: Thu, 29 Jun 2017 09:25:24 +0800
Subject: [PATCH] fixing package docker-engine is not available.

---
 .travis.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 03e4e58..87a8450 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -41,8 +41,10 @@ env:
 
 # Installing a newer Docker version
 before_install:
+  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
   - sudo apt-get update
-  - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-engine
+  - sudo apt-get -y install docker-ce
 
 script: ./travis-build.sh