diff --git a/.travis.yml b/.travis.yml
index b63f07e6f..24658c907 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,9 @@ env:
   global:
     - JRUBY_OPTS="$JRUBY_OPTS --debug"
 
+before_install:
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem install bundler -v '< 2'
 matrix:
   allow_failures:
     - rvm: jruby-head
diff --git a/lib/twitter/rest/request.rb b/lib/twitter/rest/request.rb
index 423b1d403..c5b2d1fd1 100644
--- a/lib/twitter/rest/request.rb
+++ b/lib/twitter/rest/request.rb
@@ -118,7 +118,7 @@ def symbolize_keys!(object)
       # @return [HTTP::Client, HTTP]
       def http_client
         client = @client.proxy ? HTTP.via(*proxy) : HTTP
-        client = client.timeout(:per_operation, connect: @client.timeouts[:connect], read: @client.timeouts[:read], write: @client.timeouts[:write]) if @client.timeouts
+        client = client.timeout(connect: @client.timeouts[:connect], read: @client.timeouts[:read], write: @client.timeouts[:write]) if @client.timeouts
         client
       end
 
diff --git a/spec/twitter/rest/request_spec.rb b/spec/twitter/rest/request_spec.rb
index d13dfec7b..31a0103e9 100644
--- a/spec/twitter/rest/request_spec.rb
+++ b/spec/twitter/rest/request_spec.rb
@@ -41,7 +41,7 @@
         end
         it 'requests with given timeout settings' do
           stub_post('/1.1/statuses/update.json').with(body: {status: 'Update'}).to_return(body: fixture('status.json'), headers: {content_type: 'application/json; charset=utf-8'})
-          expect_any_instance_of(HTTP::Client).to receive(:timeout).with(:per_operation, connect: 2, read: 2, write: 3).and_call_original
+          expect_any_instance_of(HTTP::Client).to receive(:timeout).with(connect: 2, read: 2, write: 3).and_call_original
           @client.update('Update')
         end
       end
@@ -53,7 +53,7 @@
       end
       it 'requests with given timeout settings' do
         stub_post('/1.1/statuses/update.json').with(body: {status: 'Update'}).to_return(body: fixture('status.json'), headers: {content_type: 'application/json; charset=utf-8'})
-        expect(HTTP).to receive(:timeout).with(:per_operation, connect: 2, read: 2, write: 3).and_call_original
+        expect(HTTP).to receive(:timeout).with(connect: 2, read: 2, write: 3).and_call_original
         @client.update('Update')
       end
     end
diff --git a/twitter.gemspec b/twitter.gemspec
index 07362fe16..0a1647776 100644
--- a/twitter.gemspec
+++ b/twitter.gemspec
@@ -6,7 +6,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'addressable', '~> 2.3'
   spec.add_dependency 'buftok', '~> 0.2.0'
   spec.add_dependency 'equalizer', '~> 0.0.11'
-  spec.add_dependency 'http', '~> 3.0'
+  spec.add_dependency 'http', '~> 4.0'
   spec.add_dependency 'http-form_data', '~> 2.0'
   spec.add_dependency 'http_parser.rb', '~> 0.6.0'
   spec.add_dependency 'memoizable', '~> 0.4.0'