diff --git a/.travis.yml b/.travis.yml
index baa2c68..a6d0ef1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,10 @@
 language: ruby
 rvm:
-  - 2.2.2
-  - 2.1.2
-  - 2.0.0
-  - 1.9.3
+  - ruby-head
+  - 2.7
+  - 2.6
+  - 2.5
+
+matrix:
+  allow_failures:
+    - rvm: ruby-head
diff --git a/rounding.gemspec b/rounding.gemspec
index d6224f6..4dd09f9 100644
--- a/rounding.gemspec
+++ b/rounding.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 1.6"
+  spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "activesupport"