.travis.yml in ffprober-0.5.1 vs .travis.yml in ffprober-0.5.2

@@ -1,9 +1,10 @@
 language: ruby
 
 before_install:
- - gem install bundler
+  - gem update --system
+  - gem install bundler
 
 before_script:
   - echo $PATH
   - cp test/ffprobe /home/travis/bin
 
@@ -19,16 +20,10 @@
 addons:
   code_climate:
     repo_token: e319ec7d18fb8e1f05b460c3ef8fac58af3844d7bfa3d44de6b82eb874bb3e31
 
 rvm:
-  - 2.0.0-p648
-  - 2.1.8
-  - 2.2.4
-  - 2.3.0
-  - rbx-2
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
   - ruby-head
   - jruby-head
-
-matrix:
-  allow_failures:
-    - rvm: rbx-2