diff --git a/Gemfile b/Gemfile
index fff3d32..a56740e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,8 +12,10 @@ gem "susy" , "2.2.12"
 
 gem 'high_voltage'
 
-gem 'opal-rails'
-gem 'opal-browser'
+gem 'opal', '~> 0.11.0'
+gem 'opal-rails' , "0.9.4"
+gem 'opal-jquery', github: 'opal/opal-jquery'
+gem 'opal-browser' , "0.2.0"
 gem "rubyx-debugger" , "0.3" , path: "../rubyx-debugger" , require: false
 gem "rubyx" , "0.6" , :path => "../rubyx" , require: false
 gem "rx-file" , :git => "https://github.com/ruby-x/rx-file"
diff --git a/Gemfile.lock b/Gemfile.lock
index c603fb1..aef5173 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,10 @@
+GIT
+  remote: git://github.com/opal/opal-jquery.git
+  revision: f47a9b42da366cea270f743b05acf529f3077d35
+  specs:
+    opal-jquery (0.4.2)
+      opal (>= 0.10.0, < 0.12.0)
+
 GIT
   remote: https://github.com/ruby-x/rx-file
   revision: c1de10352d8af105fe532008ceafcdd30b5fbdab
@@ -67,15 +74,15 @@ GEM
     bindex (0.5.0)
     builder (3.2.3)
     byebug (10.0.2)
-    capybara (2.18.0)
+    capybara (3.0.2)
       addressable
       mini_mime (>= 0.1.3)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (>= 2.0, < 4.0)
-    capybara-screenshot (1.0.18)
-      capybara (>= 1.0, < 3)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      xpath (~> 3.0)
+    capybara-screenshot (1.0.19)
+      capybara (>= 1.0, < 4)
       launchy
     concurrent-ruby (1.0.5)
     crass (1.0.4)
@@ -129,18 +136,16 @@ GEM
     nio4r (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    opal (0.10.5)
+    opal (0.11.0)
+      ast (>= 2.3.0)
       hike (~> 1.2)
+      parser (= 2.3.3.1)
       sourcemap (~> 0.1.0)
-      sprockets (~> 3.1)
-      tilt (>= 1.4)
     opal-activesupport (0.3.1)
       opal (>= 0.5.0, < 1.0.0)
     opal-browser (0.2.0)
       opal
       paggio
-    opal-jquery (0.4.2)
-      opal (>= 0.7.0, < 0.11.0)
     opal-rails (0.9.4)
       jquery-rails
       opal (>= 0.10.0, < 0.12)
@@ -149,15 +154,15 @@ GEM
       opal-sprockets (~> 0.4.1)
       rails (>= 4.1, < 6.0)
       sprockets-rails (>= 2.3.3, < 4.0)
-    opal-sprockets (0.4.1.0.10.4.3.1.0)
-      opal (~> 0.10.4)
+    opal-sprockets (0.4.1.0.11.0.3.1)
+      opal (~> 0.11.0)
       sprockets (~> 3.1)
       tilt (>= 1.4)
     paggio (0.2.6)
     parser (2.3.3.1)
       ast (~> 2.2)
     public_suffix (3.0.2)
-    puma (3.11.3)
+    puma (3.11.4)
     rack (2.0.4)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -239,9 +244,9 @@ GEM
     tilt (2.0.8)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.8)
+    uglifier (4.1.9)
       execjs (>= 0.3.0, < 3)
-    web-console (3.5.1)
+    web-console (3.6.0)
       actionview (>= 5.0)
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
@@ -262,8 +267,10 @@ DEPENDENCIES
   haml-rails
   high_voltage
   listen (>= 3.0.5, < 3.2)
-  opal-browser
-  opal-rails
+  opal (~> 0.11.0)
+  opal-browser (= 0.2.0)
+  opal-jquery!
+  opal-rails (= 0.9.4)
   puma (~> 3.11)
   rails
   rspec-rails
diff --git a/app/assets/javascripts/debug.js.rb b/app/assets/javascripts/debug.js.rb
index 8e5bd70..d6d4daf 100644
--- a/app/assets/javascripts/debug.js.rb
+++ b/app/assets/javascripts/debug.js.rb
@@ -1,3 +1,2 @@
 require "opal"
-
 require "debugger"
diff --git a/config/initializers/debugger.rb b/config/initializers/debugger.rb
index 93ff9bb..242358e 100644
--- a/config/initializers/debugger.rb
+++ b/config/initializers/debugger.rb
@@ -1,2 +1 @@
 Opal.use_gem("rubyx")
-Opal.use_gem("ast")