diff --git a/Gemfile b/Gemfile
index 1840121..17b0f16 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '4.0.2'
+gem 'rails', '5.2.8.1'
 
 # use postgress
 gem 'pg'
@@ -16,7 +16,7 @@ gem 'haml'
 gem "active_model_serializers"
 
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 4.0.0'
+gem 'sass-rails', '~> 4.0.1'
 
 gem 'pry'
 
@@ -24,7 +24,7 @@ gem 'pry'
 gem 'uglifier', '>= 1.3.0'
 
 # Use CoffeeScript for .js.coffee assets and views
-gem 'coffee-rails', '~> 4.0.0'
+gem 'coffee-rails', '~> 4.0.1'
 
 # add gem to implement pagination
 gem 'kaminari'
@@ -41,7 +41,7 @@ gem 'jquery-rails'
 gem 'turbolinks'
 
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
-gem 'jbuilder', '~> 1.2'
+gem 'jbuilder', '~> 1.5', '>= 1.5.3'
 
 group :doc do
   # bundle exec rake doc:rails generates the API under doc/api.