diff --git a/Gemfile b/Gemfile
index 04f0176..ba7d990 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'rails', '4.2.0'
 # Use postgresql as the database for Active Record
 gem 'pg'
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0'
+gem 'sass-rails', '~> 5.0', '>= 5.0.1'
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 # Use CoffeeScript for .coffee assets and views
@@ -15,7 +15,7 @@ gem 'coffee-rails', '~> 4.1.0'
 # gem 'therubyracer', platforms: :ruby
 
 # Use jquery as the JavaScript library
-gem 'jquery-rails'
+gem 'jquery-rails', '>= 4.0.3'
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
 # gem 'turbolinks'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
@@ -37,18 +37,18 @@ group :development, :test do
   gem 'byebug'
 
   # Access an IRB console on exception pages or by using <%= console %> in views
-  gem 'web-console', '~> 2.0'
+  gem 'web-console', '~> 2.0', '>= 2.0.0'
 
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
 end
 
-gem 'simple_form'
+gem 'simple_form', '>= 3.0.2'
 
-gem 'ckeditor_rails'
+gem 'ckeditor_rails', '>= 4.4.3'
 
 gem 'nested_form'
 
-gem 'responders', '~> 2.0'
+gem 'responders', '~> 2.1', '>= 2.1.0'
 
 gem 'grape'