diff --git a/Gemfile b/Gemfile
index c55b781..5e9f7ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,18 +2,19 @@
 source 'http://rubygems.org'
 source 'http://rails-assets.org'
 
-# Declare your gem's dependencies in abraham.gemspec.
-# Bundler will treat runtime dependencies like base dependencies, and
-# development dependencies will be added by default to the :development group.
-gemspec
-
 # These rails-assets dependencies need to be added to the developer's Gemfile
 # since there's no way to specify a source in the gemspec.
 source 'http://rails-assets.org' do
   gem 'rails-assets-shepherd.js', '~> 1.8'
   gem 'rails-assets-js-cookie', '~> 2.1'
+  gem 'rails-assets-tether', '~> 1.4'
 end
 
+# Declare your gem's dependencies in abraham.gemspec.
+# Bundler will treat runtime dependencies like base dependencies, and
+# development dependencies will be added by default to the :development group.
+gemspec
+
 # Declare any dependencies that are still in development here instead of in
 # your gemspec. These might include edge Rails or gems from your path or
 # Git. Remember to move these dependencies to your gemspec before releasing
@@ -21,6 +22,3 @@ end
 
 # To use a debugger
 # gem 'byebug', group: [:development, :test]
-
-# Avoid the 'multiple sources' confusion
-gem 'rails-assets-tether', :source => 'http://rails-assets.org/'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7658868..314ccd1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,140 +6,152 @@ PATH
       rails (~> 5.0.0, >= 5.0.0.1)
       rails-assets-js-cookie (~> 2.1)
       rails-assets-shepherd.js (~> 1.8)
+      rails-assets-tether (~> 1.4)
       sass-rails (~> 5.0)
 
 GEM
   remote: http://rubygems.org/
   remote: http://rails-assets.org/
   specs:
-    actioncable (5.0.0.1)
-      actionpack (= 5.0.0.1)
-      nio4r (~> 1.2)
+    actioncable (5.0.7)
+      actionpack (= 5.0.7)
+      nio4r (>= 1.2, < 3.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.0.0.1)
-      actionpack (= 5.0.0.1)
-      actionview (= 5.0.0.1)
-      activejob (= 5.0.0.1)
+    actionmailer (5.0.7)
+      actionpack (= 5.0.7)
+      actionview (= 5.0.7)
+      activejob (= 5.0.7)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.0.0.1)
-      actionview (= 5.0.0.1)
-      activesupport (= 5.0.0.1)
+    actionpack (5.0.7)
+      actionview (= 5.0.7)
+      activesupport (= 5.0.7)
       rack (~> 2.0)
       rack-test (~> 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.0.0.1)
-      activesupport (= 5.0.0.1)
+    actionview (5.0.7)
+      activesupport (= 5.0.7)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (5.0.0.1)
-      activesupport (= 5.0.0.1)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (5.0.7)
+      activesupport (= 5.0.7)
       globalid (>= 0.3.6)
-    activemodel (5.0.0.1)
-      activesupport (= 5.0.0.1)
-    activerecord (5.0.0.1)
-      activemodel (= 5.0.0.1)
-      activesupport (= 5.0.0.1)
+    activemodel (5.0.7)
+      activesupport (= 5.0.7)
+    activerecord (5.0.7)
+      activemodel (= 5.0.7)
+      activesupport (= 5.0.7)
       arel (~> 7.0)
-    activesupport (5.0.0.1)
+    activesupport (5.0.7)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (7.1.4)
-    ast (2.3.0)
-    builder (3.2.2)
-    concurrent-ruby (1.0.3)
+    ast (2.4.0)
+    builder (3.2.3)
+    concurrent-ruby (1.0.5)
+    crass (1.0.4)
     erubis (2.7.0)
-    globalid (0.3.7)
-      activesupport (>= 4.1.0)
-    i18n (0.7.0)
-    jquery-rails (4.2.1)
+    ffi (1.9.23)
+    globalid (0.4.1)
+      activesupport (>= 4.2.0)
+    i18n (1.0.1)
+      concurrent-ruby (~> 1.0)
+    jquery-rails (4.3.3)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    loofah (2.0.3)
+    loofah (2.2.2)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.6.4)
-      mime-types (>= 1.16, < 4)
-    method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
-    minitest (5.10.1)
-    nio4r (1.2.1)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
-    parser (2.3.2.0)
-      ast (~> 2.2)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
+    method_source (0.9.0)
+    mini_mime (1.0.0)
+    mini_portile2 (2.3.0)
+    minitest (5.11.3)
+    nio4r (2.3.1)
+    nokogiri (1.8.2)
+      mini_portile2 (~> 2.3.0)
+    parallel (1.12.1)
+    parser (2.5.1.0)
+      ast (~> 2.4.0)
     powerpack (0.1.1)
-    rack (2.0.1)
+    rack (2.0.5)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (5.0.0.1)
-      actioncable (= 5.0.0.1)
-      actionmailer (= 5.0.0.1)
-      actionpack (= 5.0.0.1)
-      actionview (= 5.0.0.1)
-      activejob (= 5.0.0.1)
-      activemodel (= 5.0.0.1)
-      activerecord (= 5.0.0.1)
-      activesupport (= 5.0.0.1)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 5.0.0.1)
+    rails (5.0.7)
+      actioncable (= 5.0.7)
+      actionmailer (= 5.0.7)
+      actionpack (= 5.0.7)
+      actionview (= 5.0.7)
+      activejob (= 5.0.7)
+      activemodel (= 5.0.7)
+      activerecord (= 5.0.7)
+      activesupport (= 5.0.7)
+      bundler (>= 1.3.0)
+      railties (= 5.0.7)
       sprockets-rails (>= 2.0.0)
-    rails-assets-js-cookie (2.1.3)
+    rails-assets-js-cookie (2.2.0)
     rails-assets-shepherd.js (1.8.1)
       rails-assets-tether (>= 1.0.1, < 2)
-    rails-assets-tether (1.4.0)
-    rails-dom-testing (2.0.1)
-      activesupport (>= 4.2.0, < 6.0)
-      nokogiri (~> 1.6.0)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    railties (5.0.0.1)
-      actionpack (= 5.0.0.1)
-      activesupport (= 5.0.0.1)
+    rails-assets-tether (1.4.3)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    railties (5.0.7)
+      actionpack (= 5.0.7)
+      activesupport (= 5.0.7)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.1.0)
-    rake (12.0.0)
-    rubocop (0.45.0)
-      parser (>= 2.3.1.1, < 3.0)
+    rainbow (3.0.0)
+    rake (12.3.1)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
+    rubocop (0.55.0)
+      parallel (~> 1.10)
+      parser (>= 2.5)
       powerpack (~> 0.1)
-      rainbow (>= 1.99.1, < 3.0)
+      rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.8.1)
-    sass (3.4.22)
-    sass-rails (5.0.6)
+    ruby-progressbar (1.9.0)
+    sass (3.5.6)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sass-rails (5.0.7)
       railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sprockets (3.7.0)
+    sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.0)
+    sprockets-rails (3.2.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sqlite3 (1.3.12)
-    thor (0.19.4)
-    thread_safe (0.3.5)
-    tilt (2.0.5)
-    tzinfo (1.2.2)
+    sqlite3 (1.3.13)
+    thor (0.20.0)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.1.1)
-    websocket-driver (0.6.4)
+    unicode-display_width (1.3.2)
+    websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
+    websocket-extensions (0.1.3)
 
 PLATFORMS
   ruby
@@ -148,9 +160,9 @@ DEPENDENCIES
   abraham!
   rails-assets-js-cookie (~> 2.1)!
   rails-assets-shepherd.js (~> 1.8)!
-  rails-assets-tether!
+  rails-assets-tether (~> 1.4)!
   rubocop
   sqlite3
 
 BUNDLED WITH
-   1.13.7
+   1.16.1
diff --git a/abraham.gemspec b/abraham.gemspec
index 7b3eb29..9ba7872 100644
--- a/abraham.gemspec
+++ b/abraham.gemspec
@@ -22,6 +22,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'jquery-rails'
   s.add_dependency 'rails-assets-shepherd.js', '~> 1.8'
   s.add_dependency 'rails-assets-js-cookie', '~> 2.1'
+  s.add_dependency 'rails-assets-tether', '~> 1.4'
 
   s.add_development_dependency 'sqlite3'
   s.add_development_dependency 'rubocop'