Gemfile in sentry-raven-2.7.4 vs Gemfile in sentry-raven-2.8.0

@@ -2,16 +2,16 @@
 
 gemspec
 
 if ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 4)
   gem "rails", "< 5"
-  gem "rspec-rails"
+  gem "rspec-rails", "> 3"
 elsif ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 0)
   # no-op. No Rails.
 else
   gem "rails", "< 6"
-  gem "rspec-rails"
+  gem "rspec-rails", "> 3"
 end
 
 if RUBY_VERSION < '2.0'
   gem "mime-types", "< 3.0.0"
   gem "nokogiri", "~> 1.6.8"
@@ -26,12 +26,12 @@
 gem "pry"
 gem "pry-coolline"
 gem "benchmark-ips"
 gem "benchmark-ipsa" if RUBY_VERSION > '2.0'
 gem "ruby-prof", platform: :mri
-gem "rake"
-gem "rubocop", "~> 0.41.1"
-gem "rspec"
+gem "rake", "> 12"
+gem "rubocop", "~> 0.41.1" # Last version that supported 1.9, upgrade to 0.50 after we drop 1.9
+gem "rspec", "> 3"
 gem "capybara" # rspec system tests
 gem "puma" # rspec system tests
 
 gem "timecop"
 gem "test-unit", platform: :mri if RUBY_VERSION > '2.2'