diff --git a/.travis.yml b/.travis.yml
index b007811..5fe5ae7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,24 +16,16 @@ script:
   - bundle exec rspec
 
 rvm:
-  - 2.1.10
-  - 2.2.9
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
-  - jruby-9.0.5.0
+  - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
+  - jruby-head
   - ruby-head
 
-gemfile:
-  - gemfiles/rack_1.gemfile
-  - gemfiles/rack_2.gemfile
-
 matrix:
   allow_failures:
     - rvm: ruby-head
 
   fast_finish: true
 
-  exclude:
-    - rvm: 2.1.10
-      gemfile: gemfiles/rack_2.gemfile
diff --git a/Appraisals b/Appraisals
deleted file mode 100644
index 5cf920e..0000000
--- a/Appraisals
+++ /dev/null
@@ -1,9 +0,0 @@
-appraise 'rack-1' do
-  gem 'rack', '~> 1.x'
-  gem 'rack-test', '~> 0.7.0'
-  gem 'term-ansicolor', '1.3.2'
-end
-
-appraise 'rack-2' do
-  gem 'rack', '~> 2.x'
-end
diff --git a/Gemfile b/Gemfile
index 3cb5947..0d40ba9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,14 +2,7 @@ source 'https://rubygems.org'
 
 group :test do
   gem 'coveralls', '~> 0.8', '>= 0.8.13', require: false
-
-  # Lock coveralls dependencies to lower versions to work with older rubies
-  gem 'json', '~> 1.8'
-  gem 'tins', '~> 1.6.0'
-
   gem 'mime-types', '< 3'
 end
 
-gem 'appraisal'
-
 gemspec
diff --git a/gemfiles/rack_1.gemfile b/gemfiles/rack_1.gemfile
deleted file mode 100644
index f272e92..0000000
--- a/gemfiles/rack_1.gemfile
+++ /dev/null
@@ -1,17 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "appraisal"
-gem "rack", "~> 1.x"
-gem "rack-test", "~> 0.7.0"
-gem "term-ansicolor", "1.3.2"
-
-group :test do
-  gem "coveralls", "~> 0.8", ">= 0.8.13", require: false
-  gem "json", "~> 1.8"
-  gem "tins", "~> 1.6.0"
-  gem "mime-types", "< 3"
-end
-
-gemspec path: "../"
diff --git a/gemfiles/rack_2.gemfile b/gemfiles/rack_2.gemfile
deleted file mode 100644
index fb8ae99..0000000
--- a/gemfiles/rack_2.gemfile
+++ /dev/null
@@ -1,15 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "appraisal"
-gem "rack", "~> 2.x"
-
-group :test do
-  gem "coveralls", "~> 0.8", ">= 0.8.13", require: false
-  gem "json", "~> 1.8"
-  gem "tins", "~> 1.6.0"
-  gem "mime-types", "< 3"
-end
-
-gemspec path: "../"