diff --git a/lib/twitter_ebooks/archive.rb b/lib/twitter_ebooks/archive.rb
index ea50f79..87e06dc 100644
--- a/lib/twitter_ebooks/archive.rb
+++ b/lib/twitter_ebooks/archive.rb
@@ -31,12 +31,14 @@ module Ebooks
         end
       end
 
-      Twitter::REST::Client.new do |config|
+      Twitter.configure do |config|
         config.consumer_key = @config[:consumer_key]
         config.consumer_secret = @config[:consumer_secret]
-        config.access_token = @config[:oauth_token]
-        config.access_token_secret = @config[:oauth_token_secret]
+        config.oauth_token = @config[:oauth_token]
+        config.oauth_token_secret = @config[:oauth_token_secret]
       end
+
+      Twitter::Client.new
     end
 
     def initialize(username, path, client=nil)
diff --git a/lib/twitter_ebooks/bot.rb b/lib/twitter_ebooks/bot.rb
index 1f5a804..aa8456e 100755
--- a/lib/twitter_ebooks/bot.rb
+++ b/lib/twitter_ebooks/bot.rb
@@ -43,13 +43,15 @@ module Ebooks
         config.oauth_token_secret = @oauth_token_secret
       end
 
-      @twitter = Twitter::REST::Client.new do |config|
+      Twitter.configure do |config|
         config.consumer_key = @consumer_key
         config.consumer_secret = @consumer_secret
-        config.access_token = @access_token
-        config.access_token_secret = @access_token_secret
+        config.oauth_token = @oauth_token
+        config.oauth_token_secret = @oauth_token_secret
       end
 
+      @twitter = Twitter::Client.new
+
       needs_stream = [@on_follow, @on_message, @on_mention, @on_timeline].any? {|e| !e.nil?}
 
       @stream = TweetStream::Client.new if needs_stream
@@ -88,19 +90,19 @@ module Ebooks
       end
 
       @stream.userstream do |ev|
-        next unless ev.text # If it's not a text-containing tweet, ignore it
-        next if ev.user.screen_name == @username # Ignore our own tweets
+        next unless ev[:text] # If it's not a text-containing tweet, ignore it
+        next if ev[:user][:screen_name] == @username # Ignore our own tweets
 
         meta = {}
         mentions = ev.attrs[:entities][:user_mentions].map { |x| x[:screen_name] }
 
         reply_mentions = mentions.reject { |m| m.downcase == @username.downcase }
-        reply_mentions = [ev.user.screen_name] + reply_mentions
+        reply_mentions = [ev[:user][:screen_name]] + reply_mentions
 
         meta[:reply_prefix] = reply_mentions.uniq.map { |m| '@'+m }.join(' ') + ' '
         meta[:limit] = 140 - meta[:reply_prefix].length
 
-        mless = ev.text
+        mless = ev[:text]
         begin
           ev.attrs[:entities][:user_mentions].reverse.each do |entity|
             last = mless[entity[:indices][1]..-1]||''
@@ -108,7 +110,7 @@ module Ebooks
           end
         rescue Exception
           p ev.attrs[:entities][:user_mentions]
-          p ev.text
+          p ev[:text]
           raise
         end
         meta[:mentionless] = mless
@@ -117,8 +119,8 @@ module Ebooks
         # - The tweet mentions list contains our username
         # - The tweet is not being retweeted by somebody else
         # - Or soft-retweeted by somebody else
-        if mentions.map(&:downcase).include?(@username.downcase) && !ev.retweeted_status && !ev.text.start_with?('RT ')
-          log "Mention from @#{ev.user.screen_name}: #{ev.text}"
+        if mentions.map(&:downcase).include?(@username.downcase) && !ev[:retweeted_status] && !ev[:text].start_with?('RT ')
+          log "Mention from @#{ev[:user][:screen_name]}: #{ev[:text]}"
           @on_mention.call(ev, meta) if @on_mention
         else
           @on_timeline.call(ev, meta) if @on_timeline
@@ -139,11 +141,11 @@ module Ebooks
       opts = opts.clone
 
       if ev.is_a? Twitter::DirectMessage
-        log "Sending DM to @#{ev.sender.screen_name}: #{text}"
-        @twitter.direct_message_create(ev.sender.screen_name, text, opts)
+        log "Sending DM to @#{ev[:sender][:screen_name]}: #{text}"
+        @twitter.direct_message_create(ev[:sender][:screen_name], text, opts)
       elsif ev.is_a? Twitter::Tweet
-        log "Replying to @#{ev.user.screen_name} with: #{text}"
-        @twitter.update(text, in_reply_to_status_id: ev.id)
+        log "Replying to @#{ev[:user][:screen_name]} with: #{text}"
+        @twitter.update(text, in_reply_to_status_id: ev[:id])
       else
         raise Exception("Don't know how to reply to a #{ev.class}")
       end
diff --git a/twitter_ebooks.gemspec b/twitter_ebooks.gemspec
index 6d9f810..de189ee 100644
--- a/twitter_ebooks.gemspec
+++ b/twitter_ebooks.gemspec
@@ -19,7 +19,9 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'memory_profiler'
   gem.add_development_dependency 'pry-byebug'
 
-  gem.add_runtime_dependency 'twitter', '~> 5.1'
+
+  gem.add_runtime_dependency 'twitter', '~> 4.0'
+  gem.add_runtime_dependency 'simple_oauth'
   gem.add_runtime_dependency 'tweetstream'
   gem.add_runtime_dependency 'rufus-scheduler'
   gem.add_runtime_dependency 'gingerice'