diff --git a/README_v2.md b/README_v2.md
index 69b88740..b3dd2516 100644
--- a/README_v2.md
+++ b/README_v2.md
@@ -47,7 +47,7 @@ gem install line-bot-api
 ```ruby
 # app.rb
 require 'sinatra'
-require 'line/bot'
+require 'line-bot-api'
 
 set :environment, :production
 
@@ -138,7 +138,7 @@ Error details are stored in body.
 
 ```ruby
 require 'json'
-require 'line/bot'
+require 'line-bot-api'
 
 def client
   @client ||= Line::Bot::V2::MessagingApi::ApiClient.new(
diff --git a/examples/v1/rich_menu/app.rb b/examples/v1/rich_menu/app.rb
index a70d7a95..7b5c0fac 100644
--- a/examples/v1/rich_menu/app.rb
+++ b/examples/v1/rich_menu/app.rb
@@ -1,4 +1,4 @@
-require 'line/bot'
+require 'line-bot-api'
 
 def client
     @client ||= Line::Bot::Client.new { |config|
diff --git a/examples/v2/echobot/app.rb b/examples/v2/echobot/app.rb
index 8229a155..014616e9 100644
--- a/examples/v2/echobot/app.rb
+++ b/examples/v2/echobot/app.rb
@@ -1,5 +1,5 @@
 require 'sinatra'
-require 'line/bot'
+require 'line-bot-api'
 
 set :environment, :production
 
diff --git a/examples/v2/kitchensink/app.rb b/examples/v2/kitchensink/app.rb
index 94265744..cfda38e2 100644
--- a/examples/v2/kitchensink/app.rb
+++ b/examples/v2/kitchensink/app.rb
@@ -1,6 +1,6 @@
 require 'json'
 require 'sinatra'
-require 'line/bot'
+require 'line-bot-api'
 
 set :environment, :production
 set :app_base_url, ENV['APP_BASE_URL']
diff --git a/examples/v2/rich_menu/app.rb b/examples/v2/rich_menu/app.rb
index 2d139a94..c1c01a4d 100644
--- a/examples/v2/rich_menu/app.rb
+++ b/examples/v2/rich_menu/app.rb
@@ -1,4 +1,4 @@
-require 'line/bot'
+require 'line-bot-api'
 
 def client
   @client ||= Line::Bot::V2::MessagingApi::ApiClient.new(
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index fe3b0e31..978787c9 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,4 +2,4 @@
 
 require 'webmock/rspec'
 
-require 'line/bot'
+require 'line-bot-api'