diff --git a/.travis.yml b/.travis.yml
index ddff645f..ec4ca595 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 language: ruby
 rvm:
+  - 3.0
+  - 2.7
+  - 2.6
   - 2.5
   - 2.4
   - 2.3
@@ -8,7 +11,7 @@ rvm:
   - 2.0
 branches:
   only:
-  - master
+    - master
 matrix:
   include:
     # Run Danger only once, on 2.5
diff --git a/Gemfile b/Gemfile
index 1b61272c..40d01c95 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,11 +2,6 @@ source 'https://rubygems.org'
 
 gemspec
 
-platforms :rbx do
-  gem 'rubysl', '~> 2.0'
-  gem 'json'
-end
-
 # public_suffix 3+ requires ruby 2.1+
 if Gem::Requirement.new('< 2.1').satisfied_by?(Gem::Version.new(RUBY_VERSION))
   gem 'public_suffix', '< 3'