diff --git a/.travis.yml b/.travis.yml
index beb2c05..2e13468 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 bundler_args: --without development
 before_install: gem install bundler
+cache: bundler
 env:
   global:
     - JRUBY_OPTS="$JRUBY_OPTS --debug"
diff --git a/spec/helper.rb b/spec/helper.rb
index 6d3c80a..aae18e3 100644
--- a/spec/helper.rb
+++ b/spec/helper.rb
@@ -5,7 +5,8 @@ if RUBY_VERSION >= '1.9'
   SimpleCov.formatters = [SimpleCov::Formatter::HTMLFormatter, Coveralls::SimpleCov::Formatter]
 
   SimpleCov.start do
-    add_filter '/spec'
+    add_filter '/spec/'
+    add_filter '/vendor/'
     minimum_coverage(92.93)
   end
 end