diff --git a/.ruby-version b/.ruby-version
index 2bf1c1ccf36..005119baaa0 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.1
+2.4.1
diff --git a/.travis.yml b/.travis.yml
index b1b0c2bcda2..a9824ccf7d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ addons:
   postgresql: 9.4
 
 rvm:
-  - 2.3.1
+  - 2.4.1
 
 services:
   - redis-server
diff --git a/Dockerfile b/Dockerfile
index 57a8f34e97e..a05525b33a2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.3.1-alpine
+FROM ruby:2.4.1-alpine
 
 LABEL maintainer="https://github.com/tootsuite/mastodon" \
       description="A GNU Social-compatible microblogging server"
diff --git a/Gemfile b/Gemfile
index 7895a345c1a..8810c83defb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 source 'https://rubygems.org'
-ruby '2.3.1'
+ruby '2.4.1'
 
 gem 'rails', '~> 5.0.2'
 gem 'sass-rails', '~> 5.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index aa048aace0f..6e38655272d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,7 +24,7 @@ GEM
       erubis (~> 2.7.0)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    active_record_query_trace (1.5.3)
+    active_record_query_trace (1.5.4)
     activejob (5.0.2)
       activesupport (= 5.0.2)
       globalid (>= 0.3.6)
@@ -39,7 +39,7 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.0)
+    addressable (2.5.1)
       public_suffix (~> 2.0, >= 2.0.2)
     airbrussh (1.1.2)
       sshkit (>= 1.6.1, != 1.7.0)
@@ -47,17 +47,17 @@ GEM
     ast (2.3.0)
     attr_encrypted (3.0.3)
       encryptor (~> 3.0.0)
-    autoprefixer-rails (6.5.0.2)
+    autoprefixer-rails (6.7.7.1)
       execjs
     av (0.9.0)
       cocaine (~> 0.5.3)
-    aws-sdk (2.6.28)
-      aws-sdk-resources (= 2.6.28)
-    aws-sdk-core (2.6.28)
+    aws-sdk (2.9.6)
+      aws-sdk-resources (= 2.9.6)
+    aws-sdk-core (2.9.6)
       aws-sigv4 (~> 1.0)
       jmespath (~> 1.0)
-    aws-sdk-resources (2.6.28)
-      aws-sdk-core (= 2.6.28)
+    aws-sdk-resources (2.9.6)
+      aws-sdk-core (= 2.9.6)
     aws-sigv4 (1.0.0)
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
@@ -78,12 +78,11 @@ GEM
       railties (>= 4.0.0, < 5.1)
       sprockets (>= 3.6.0)
     builder (3.2.3)
-    bullet (5.3.0)
+    bullet (5.5.1)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.10.0)
-    capistrano (3.7.2)
+    capistrano (3.8.0)
       airbrussh (>= 1.0.0)
-      capistrano-harrow
       i18n
       rake (>= 10.0.0)
       sshkit (>= 1.9.0)
@@ -92,8 +91,7 @@ GEM
       sshkit (~> 1.2)
     capistrano-faster-assets (1.0.2)
       capistrano (>= 3.1)
-    capistrano-harrow (0.5.3)
-    capistrano-rails (1.2.2)
+    capistrano-rails (1.2.3)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
     capistrano-rbenv (2.1.0)
@@ -119,7 +117,7 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     debug_inspector (0.0.2)
-    devise (4.2.0)
+    devise (4.2.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 4.1.0, < 5.1)
@@ -131,16 +129,16 @@ GEM
       devise (~> 4.0)
       railties
       rotp (~> 2.0)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     docile (1.1.5)
-    domain_name (0.5.20161129)
+    domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (4.2.0)
+    doorkeeper (4.2.5)
       railties (>= 4.2)
-    dotenv (2.1.1)
-    dotenv-rails (2.1.1)
-      dotenv (= 2.1.1)
-      railties (>= 4.0, < 5.1)
+    dotenv (2.2.0)
+    dotenv-rails (2.2.0)
+      dotenv (= 2.2.0)
+      railties (>= 3.2, < 5.1)
     easy_translate (0.5.0)
       json
       thread
@@ -148,14 +146,14 @@ GEM
     encryptor (3.0.0)
     erubis (2.7.0)
     execjs (2.7.0)
-    fabrication (2.15.2)
-    faker (1.6.6)
+    fabrication (2.16.1)
+    faker (1.7.3)
       i18n (~> 0.5)
     fast_blank (1.0.0)
-    font-awesome-rails (4.6.3.1)
+    font-awesome-rails (4.7.0.1)
       railties (>= 3.2, < 5.1)
-    fuubar (2.1.1)
-      rspec (~> 3.0)
+    fuubar (2.2.0)
+      rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
@@ -163,20 +161,20 @@ GEM
       addressable (~> 2.4)
       http (~> 2.0)
       nokogiri (~> 1.6)
-    hamlit (2.7.2)
-      temple (~> 0.7.6)
+    hamlit (2.8.1)
+      temple (>= 0.8.0)
       thor
       tilt
-    hamlit-rails (0.1.0)
+    hamlit-rails (0.2.0)
       actionpack (>= 4.0.1)
       activesupport (>= 4.0.1)
       hamlit (>= 1.2.0)
       railties (>= 4.0.1)
-    hashdiff (0.3.0)
+    hashdiff (0.3.2)
     highline (1.7.8)
     hiredis (0.6.1)
     htmlentities (4.3.4)
-    http (2.1.0)
+    http (2.2.1)
       addressable (~> 2.3)
       http-cookie (~> 1.0)
       http-form_data (~> 1.0.1)
@@ -186,10 +184,10 @@ GEM
     http-form_data (1.0.1)
     http_accept_language (2.1.0)
     http_parser.rb (0.6.0)
-    httplog (0.3.2)
+    httplog (0.99.2)
       colorize
     i18n (0.8.1)
-    i18n-tasks (0.9.6)
+    i18n-tasks (0.9.13)
       activesupport (>= 4.0.2)
       ast (>= 2.1.0)
       easy_translate (>= 0.5.0)
@@ -197,19 +195,19 @@ GEM
       highline (>= 1.7.3)
       i18n
       parser (>= 2.2.3.0)
-      term-ansicolor (>= 1.3.2)
+      rainbow (~> 2.2)
       terminal-table (>= 1.5.1)
     jmespath (1.3.1)
-    jquery-rails (4.1.1)
+    jquery-rails (4.3.1)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    json (2.0.3)
     launchy (2.4.3)
       addressable (~> 2.3)
     letter_opener (1.4.1)
       launchy (~> 2.2)
-    letter_opener_web (1.3.0)
+    letter_opener_web (1.3.1)
       actionmailer (>= 3.2)
       letter_opener (~> 1.0)
       railties (>= 3.2)
@@ -231,11 +229,11 @@ GEM
     minitest (5.10.1)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
-    net-ssh (4.0.1)
+    net-ssh (4.1.0)
     nio4r (2.0.0)
     nokogiri (1.7.1)
       mini_portile2 (~> 2.1.0)
-    oj (2.17.3)
+    oj (2.18.5)
     orm_adapter (0.5.0)
     ostatus2 (1.0.2)
       addressable (~> 2.4)
@@ -251,26 +249,26 @@ GEM
     paperclip-av-transcoder (0.6.4)
       av (~> 0.9.0)
       paperclip (>= 2.5.2)
-    parser (2.3.1.2)
+    parser (2.4.0.0)
       ast (~> 2.2)
-    pg (0.18.4)
-    pghero (1.6.2)
+    pg (0.20.0)
+    pghero (1.6.4)
       activerecord
     powerpack (0.1.1)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-rails (0.3.4)
-      pry (>= 0.9.10)
-    public_suffix (2.0.4)
-    puma (3.6.0)
+    pry-rails (0.3.6)
+      pry (>= 0.10.4)
+    public_suffix (2.0.5)
+    puma (3.8.2)
     rabl (0.13.1)
       activesupport (>= 2.3.14)
     rack (2.0.1)
     rack-attack (5.0.1)
       rack
-    rack-cors (0.4.0)
+    rack-cors (0.4.1)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)
@@ -306,42 +304,37 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.1.0)
+    rainbow (2.2.1)
     rake (12.0.0)
-    react-rails (1.10.0)
+    react-rails (1.11.0)
       babel-transpiler (>= 0.7.0)
-      coffee-script-source (~> 1.8)
       connection_pool
       execjs
       railties (>= 3.2)
       tilt
-    redis (3.3.2)
-    redis-actionpack (5.0.0)
-      actionpack (>= 4.0.0, < 6)
-      redis-rack (~> 2.0.0.pre)
-      redis-store (~> 1.2.0.pre)
-    redis-activesupport (5.0.1)
+    redis (3.3.3)
+    redis-actionpack (5.0.1)
+      actionpack (>= 4.0, < 6)
+      redis-rack (>= 1, < 3)
+      redis-store (>= 1.1.0, < 1.4.0)
+    redis-activesupport (5.0.2)
       activesupport (>= 3, < 6)
-      redis-store (~> 1.2.0)
-    redis-rack (2.0.0)
-      rack (~> 2.0)
-      redis-store (~> 1.2.0)
-    redis-rails (5.0.1)
-      redis-actionpack (~> 5.0.0)
-      redis-activesupport (~> 5.0.0)
-      redis-store (~> 1.2.0)
-    redis-store (1.2.0)
+      redis-store (~> 1.3.0)
+    redis-rack (2.0.1)
+      rack (>= 2.0, < 3)
+      redis-store (>= 1.2, < 1.4)
+    redis-rails (5.0.2)
+      redis-actionpack (>= 5.0, < 6)
+      redis-activesupport (>= 5.0, < 6)
+      redis-store (>= 1.2, < 2)
+    redis-store (1.3.0)
       redis (>= 2.2)
     responders (2.3.0)
       railties (>= 4.2.0, < 5.1)
     rotp (2.1.2)
     rqrcode (0.10.1)
       chunky_png (~> 1.0)
-    rspec (3.5.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-    rspec-core (3.5.2)
+    rspec-core (3.5.4)
       rspec-support (~> 3.5.0)
     rspec-expectations (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
@@ -349,7 +342,7 @@ GEM
     rspec-mocks (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.5.0)
-    rspec-rails (3.5.1)
+    rspec-rails (3.5.2)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
@@ -357,40 +350,40 @@ GEM
       rspec-expectations (~> 3.5.0)
       rspec-mocks (~> 3.5.0)
       rspec-support (~> 3.5.0)
-    rspec-sidekiq (2.2.0)
-      rspec (~> 3.0, >= 3.0.0)
+    rspec-sidekiq (3.0.0)
+      rspec-core (~> 3.0, >= 3.0.0)
       sidekiq (>= 2.4.0)
     rspec-support (3.5.0)
-    rubocop (0.42.0)
-      parser (>= 2.3.1.1, < 3.0)
+    rubocop (0.48.1)
+      parser (>= 2.3.3.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-oembed (0.10.1)
+    ruby-oembed (0.12.0)
     ruby-progressbar (1.8.1)
     safe_yaml (1.0.4)
-    sass (3.4.22)
+    sass (3.4.23)
     sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sidekiq (4.2.7)
+    sidekiq (4.2.10)
       concurrent-ruby (~> 1.0)
       connection_pool (~> 2.2, >= 2.2.0)
       rack-protection (>= 1.5.0)
       redis (~> 3.2, >= 3.2.1)
-    sidekiq-unique-jobs (4.0.18)
-      sidekiq (>= 2.6)
+    sidekiq-unique-jobs (5.0.0)
+      sidekiq (>= 4.0)
       thor
-    simple-navigation (4.0.3)
+    simple-navigation (4.0.5)
       activesupport (>= 2.3.2)
-    simple_form (3.2.1)
+    simple_form (3.4.0)
       actionpack (> 4, < 5.1)
       activemodel (> 4, < 5.1)
-    simplecov (0.12.0)
+    simplecov (0.14.1)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
@@ -403,43 +396,40 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sshkit (1.11.5)
+    sshkit (1.13.1)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     statsd-instrument (2.1.2)
-    temple (0.7.7)
-    term-ansicolor (1.4.0)
-      tins (~> 1.0)
-    terminal-table (1.7.0)
-      unicode-display_width (~> 1.1)
+    temple (0.8.0)
+    terminal-table (1.7.3)
+      unicode-display_width (~> 1.1.1)
     thor (0.19.4)
     thread (0.2.2)
     thread_safe (0.3.6)
-    tilt (2.0.6)
-    tins (1.12.0)
+    tilt (2.0.7)
     twitter-text (1.14.5)
       unf (~> 0.1.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.3)
       thread_safe (~> 0.1)
     tzinfo-data (1.2017.2)
       tzinfo (>= 1.0.0)
-    uglifier (3.0.1)
+    uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)
-    unicode-display_width (1.1.0)
+    unicode-display_width (1.1.3)
     uniform_notifier (1.10.0)
-    warden (1.2.6)
+    warden (1.2.7)
       rack (>= 1.0)
-    webmock (2.1.0)
+    webmock (2.3.2)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
-    will_paginate (3.1.0)
+    will_paginate (3.1.5)
 
 PLATFORMS
   ruby
@@ -521,7 +511,7 @@ DEPENDENCIES
   will_paginate
 
 RUBY VERSION
-   ruby 2.3.1p112
+   ruby 2.4.1p111
 
 BUNDLED WITH
-   1.14.5
+   1.14.6
diff --git a/config/initializers/httplog.rb b/config/initializers/httplog.rb
index 37f113d5dbc..5cfc16a8b5f 100644
--- a/config/initializers/httplog.rb
+++ b/config/initializers/httplog.rb
@@ -1,3 +1,5 @@
-HttpLog.options[:logger] = Rails.logger
-HttpLog.options[:color]  = { color: :yellow }
-HttpLog.options[:compact_log] = true
+HttpLog.configure do |config|
+  config.logger = Rails.logger
+  config.color = { color: :yellow }
+  config.compact_log = true
+end
diff --git a/docs/Running-Mastodon/Production-guide.md b/docs/Running-Mastodon/Production-guide.md
index 785826acac9..ec67a452c17 100644
--- a/docs/Running-Mastodon/Production-guide.md
+++ b/docs/Running-Mastodon/Production-guide.md
@@ -121,7 +121,7 @@ It is recommended to use rbenv (exclusively from the `mastodon` user) to install
 [2]: https://github.com/rbenv/ruby-build#installation
 [3]: https://github.com/rbenv/ruby-build/wiki#suggested-build-environment
 
-Then once `rbenv` is ready, run `rbenv install 2.3.1` to install the Ruby version for Mastodon.
+Then once `rbenv` is ready, run `rbenv install 2.4.1` to install the Ruby version for Mastodon.
 
 ## Git