diff --git a/alpha-blog/Gemfile b/alpha-blog/Gemfile
index af3b0b6..8327695 100644
--- a/alpha-blog/Gemfile
+++ b/alpha-blog/Gemfile
@@ -7,7 +7,7 @@ end
 
 ruby '2.5.1'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.1.6'
+gem 'rails', '~> 6.0.3', '>= 6.0.3.5'
 # Use sqlite3 as the database for Active Record
 
 #Use bcrypt for password on user ActiveModel
@@ -20,8 +20,8 @@ gem 'bootstrap-will_paginate', '1.0.0'
 gem 'puma', '~> 3.7'
 # Use SCSS for stylesheets
 gem 'bootstrap-sass', '~> 3.3.7'
-gem 'jquery-rails'
-gem 'sass-rails', '~> 5.0'
+gem 'jquery-rails', '>= 4.3.5'
+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
@@ -32,7 +32,7 @@ gem 'execjs'
 gem 'simplecov', require: false, group: :test
 
 # Use CoffeeScript for .coffee assets and views
-gem 'coffee-rails', '~> 4.2'
+gem 'coffee-rails', '~> 4.2', '>= 4.2.2'
 # 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
@@ -42,7 +42,7 @@ gem 'jbuilder', '~> 2.5'
 # gem 'bcrypt', '~> 3.1.7'
 
 #gem for assert_tempalte testing in Integration Test
-gem 'rails-controller-testing'
+gem 'rails-controller-testing', '>= 1.0.4'
 
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
@@ -59,7 +59,7 @@ 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', '>= 3.7.0'
   gem 'listen', '>= 3.0.5', '< 3.2'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'