diff --git a/.travis.yml b/.travis.yml
index 936197fc7..20d6dc0c4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ bundler_args: --without documentation
 script: bundle exec rake compile test
 before_install:
   - 'if [[ "$TRAVIS_OS_NAME" = "osx" ]]; then brew install openssl; fi'
+  - gem update bundler
 env:
   global:
     - TESTOPTS=-v
@@ -9,6 +10,7 @@ language: ruby
 sudo: false
 dist: trusty
 rvm:
+  - 2.5
   - 2.4
   - 2.3
   - 2.2