.travis.yml in after_commit_everywhere-0.1.1 vs .travis.yml in after_commit_everywhere-0.1.2

@@ -9,17 +9,24 @@
     packages:
       - sqlite3
 
 matrix:
   include:
-    - rvm: 2.5.0
+    - rvm: 2.5.1
+      gemfile: gemfiles/activerecord_4_2.gemfile
+    - rvm: 2.5.1
       gemfile: gemfiles/activerecord_5_0.gemfile
-    - rvm: 2.5.0
+    - rvm: 2.5.1
       gemfile: gemfiles/activerecord_5_1.gemfile
-    - rvm: 2.5.0
+    - rvm: 2.5.1
       gemfile: gemfiles/activerecord_5_2.gemfile
-    - rvm: 2.5.0
+    - rvm: 2.5.1
       gemfile: gemfiles/activerecord_master.gemfile
-    - rvm: 2.4.3
+    - rvm: 2.4.4
       gemfile: gemfiles/activerecord_5_2.gemfile
-    - rvm: 2.3.6
+    - rvm: 2.3.7
       gemfile: gemfiles/activerecord_5_2.gemfile
+
+# https://github.com/travis-ci/travis-ci/issues/8969#issuecomment-380028168
+before_install:
+  - gem update --system
+  - gem install bundler