diff --git a/Gemfile b/Gemfile
index cfcee1c..a153bff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,22 +7,22 @@ end
 
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.1.3'
+gem 'rails', '~> 5.1.6', '>= 5.1.6.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
 gem 'puma', '~> 3.7'
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0'
+gem 'sass-rails', '~> 5.0', '>= 5.0.8'
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 # See https://github.com/rails/execjs#readme for more supported runtimes
 # gem 'therubyracer', platforms: :ruby
 gem 'rest-client'
-gem 'rack', '>= 2.0.6'
+gem 'rack', '>= 2.2.20'
 
 # Use CoffeeScript for .coffee assets and views
-gem 'coffee-rails', '~> 4.2'
+gem 'coffee-rails', '~> 5.0', '>= 5.0.0'
 # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
 gem 'turbolinks', '~> 5'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
@@ -38,13 +38,13 @@ gem 'jbuilder', '~> 2.5'
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
-  gem 'capybara'
+  gem 'capybara', '>= 3.12.0'
   gem 'rubocop'
 end
 
 group :development do
   # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
-  gem 'web-console', '>= 3.3.0'
+  gem 'web-console', '>= 4.0.0'
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem