diff --git a/.travis.yml b/.travis.yml
index b778b6b..0c1aca2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,8 +10,8 @@ rvm:
   - 2.2
   - 2.3.0
   - ruby-head
-  - jruby-1.7
-  - jruby-9
+  - jruby-1.7.26
+  - jruby-9.1.6.0
   - rbx-2
 matrix:
   allow_failures:
diff --git a/Gemfile b/Gemfile
index 527e606..95a9c63 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in http-cookie.gemspec
+ruby RUBY_VERSION
+
 gemspec