diff --git a/Gemfile b/Gemfile
index 72b14b1..aa0a368 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source 'http://rubygems.org'
+source 'https://rubygems.org'
 
 gemspec
 
diff --git a/gemfiles/rails_4_0.gemfile b/gemfiles/rails_4_0.gemfile
index d7b1a6f..2ed51c0 100644
--- a/gemfiles/rails_4_0.gemfile
+++ b/gemfiles/rails_4_0.gemfile
@@ -1,6 +1,6 @@
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 gem "rails", "~> 4.0.13"
 gem "rspec", "~> 3.6.0"
@@ -8,7 +8,7 @@ gem "rspec-rails", "~> 3.6.0"
 gem "timecop"
 gem "byebug"
 gem "appraisal"
-gem "sqlite3-ruby"
+gem "sqlite3"
 gem "nokogiri", "1.6.7"
 
 gemspec path: "../"
diff --git a/gemfiles/rails_4_1.gemfile b/gemfiles/rails_4_1.gemfile
index 01bce1d..fc59d3a 100644
--- a/gemfiles/rails_4_1.gemfile
+++ b/gemfiles/rails_4_1.gemfile
@@ -1,6 +1,6 @@
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 gem "rails", "~> 4.1.14"
 gem "rspec", "~> 3.6.0"
diff --git a/gemfiles/rails_4_2.gemfile b/gemfiles/rails_4_2.gemfile
index feea41c..1a9e46f 100644
--- a/gemfiles/rails_4_2.gemfile
+++ b/gemfiles/rails_4_2.gemfile
@@ -1,6 +1,6 @@
 # This file was generated by Appraisal
 
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 gem "rails", "~> 4.2.8"
 gem "rspec", "~> 3.6.0"