diff --git a/Gemfile b/Gemfile
index a1eb2cc..dc8e913 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,15 @@ gemspec
 
 gem 'pg', '< 1.0.0'
 
+if RUBY_VERSION < '2.3'
+  gem 'nokogiri', '< 1.10.0', require: false
+  gem 'pry-byebug', '< 3.7.0', require: false
+  gem 'public_suffix', '< 3.1.0', require: false
+  gem 'redis', '< 4.1.2', require: false
+  gem 'oj', '< 3.8.0', require: false
+end
+
 if RUBY_VERSION < '2.4'
-  gem 'mock_redis', '< 0.20.0'
+  gem 'mock_redis', '< 0.20.0', require: false
+  gem 'shoulda-matchers', '< 4.1.0', require: false
 end