Gemfile in soulless-1.2.1 vs Gemfile in soulless-1.2.2

@@ -6,26 +6,22 @@
 active_record_version = case ENV['ACTIVE_RECORD_VERSION'] || 'default'
 
 when 'master'
   { git: 'https://github.com/rails/rails.git' }
 when 'default'
-  '~> 5.1'
+  '~> 5.2'
 else
   "~> #{ENV['ACTIVE_RECORD_VERSION']}"
 end
 
 group :test do
   gem 'coveralls', require: false
   gem 'simplecov', require: false
 end
 
 group :development do
-  gem 'activerecord', '>= 4.2.0', '< 5.2'
+  gem 'activerecord', '>= 4.2.0', '< 6.0'
 
   platforms :ruby do
     gem 'sqlite3'
-  end
-
-  platforms :jruby do
-    gem "activerecord-jdbcsqlite3-adapter"
   end
 end