diff --git a/.travis.yml b/.travis.yml
index 5e1c201..a9fa390 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,17 +17,17 @@
 # under the License.
 #
 
-before_install:
-- mvn -v
-- java -version
-
 language: java
-
+sudo: required
+branches:
+  only:
+  - master
+cache:
+  directories:
+  - "$HOME/.m2/repository"
 script: "mvn install --settings travis/settings.xml"
-
 jdk:
   - oraclejdk8
-
 env:
   global:
   - secure: "JM/FMiec3GYShrMlJQSW2QG208+V0GCAj2bsP5eF8q4yzgp6o4rT+r57KDIDD6MapRN+G1Pnl3WPcS0aQYnwOhPg4tA2De1bFUPaJltP47eHFfblpjZeHMxcauCQ6BwFFr8yuC0ORsYCW3TOK00Mxq4CRlTlg5iclzHyS/pnkLI="