diff --git a/Gemfile b/Gemfile
index 409d9554..1d987106 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,7 +20,7 @@ gem 'yard', '~> 0.8.6.2'
 # See: https://github.com/rtomayko/tilt/issues/347
 gem 'tilt', '2.0.9'
 
-gem 'activesupport', '~> 5.0'
+gem 'activesupport', '~> 6.1'
 gem 'github-markup'
 gem 'nokogiri'
 gem 'pygments.rb', '~> 0.6.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index b496fe51..fb4247b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,11 +16,12 @@ GEM
   remote: https://rubygems.org/
   specs:
     CFPropertyList (3.0.3)
-    activesupport (5.2.6)
+    activesupport (6.1.7.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     algoliasearch (1.27.5)
@@ -29,10 +30,10 @@ GEM
     atomos (0.1.3)
     backports (3.21.0)
     claide (1.0.3)
-    cocoapods (1.11.2)
+    cocoapods (1.11.3)
       addressable (~> 2.8)
       claide (>= 1.0.2, < 2.0)
-      cocoapods-core (= 1.11.2)
+      cocoapods-core (= 1.11.3)
       cocoapods-deintegrate (>= 1.0.3, < 2.0)
       cocoapods-downloader (>= 1.4.0, < 2.0)
       cocoapods-plugins (>= 1.0.0, < 2.0)
@@ -47,7 +48,7 @@ GEM
       nap (~> 1.0)
       ruby-macho (>= 1.0, < 3.0)
       xcodeproj (>= 1.21.0, < 2.0)
-    cocoapods-core (1.11.2)
+    cocoapods-core (1.11.3)
       activesupport (>= 5.0, < 7)
       addressable (~> 2.8)
       algoliasearch (~> 1.0)
@@ -99,7 +100,7 @@ GEM
     hashie (3.6.0)
     http_parser.rb (0.6.0)
     httpclient (2.8.3)
-    i18n (0.9.5)
+    i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     json (2.5.1)
     kramdown (2.3.1)
@@ -109,20 +110,20 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
     memoist (0.16.2)
-    middleman (4.3.11)
+    middleman (4.4.3)
       coffee-script (~> 2.2)
-      haml (>= 4.0.5)
+      haml (>= 4.0.5, < 6.0)
       kramdown (>= 2.3.0)
-      middleman-cli (= 4.3.11)
-      middleman-core (= 4.3.11)
-    middleman-cli (4.3.11)
+      middleman-cli (= 4.4.3)
+      middleman-core (= 4.4.3)
+    middleman-cli (4.4.3)
       thor (>= 0.17.0, < 2.0)
-    middleman-core (4.3.11)
-      activesupport (>= 4.2, < 6.0)
-      addressable (~> 2.3)
+    middleman-core (4.4.3)
+      activesupport (>= 6.1, < 7.1)
+      addressable (~> 2.4)
       backports (~> 3.6)
-      bundler
-      contracts (~> 0.13.0)
+      bundler (~> 2.0)
+      contracts (~> 0.13)
       dotenv
       erubis
       execjs (~> 2.0)
@@ -130,16 +131,18 @@ GEM
       fastimage (~> 2.0)
       hamster (~> 3.0)
       hashie (~> 3.4)
-      i18n (~> 0.9.0)
-      listen (~> 3.0.0)
+      i18n (~> 1.6.0)
+      listen (~> 3.0)
       memoist (~> 0.14)
-      padrino-helpers (~> 0.13.0)
+      padrino-helpers (~> 0.15.0)
       parallel
       rack (>= 1.4.5, < 3)
       sassc (~> 2.0)
       servolux
       tilt (~> 2.0.9)
+      toml
       uglifier (~> 3.0)
+      webrick
     middleman-livereload (3.4.7)
       em-websocket (~> 0.5.1)
       middleman-core (>= 3.3)
@@ -151,7 +154,7 @@ GEM
       middleman-core (>= 3.2)
       rouge (~> 3.2)
     mini_portile2 (2.8.0)
-    minitest (5.14.4)
+    minitest (5.17.0)
     molinillo (0.8.0)
     nanaimo (0.3.0)
     nap (1.1.0)
@@ -159,13 +162,13 @@ GEM
     nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    padrino-helpers (0.13.3.4)
-      i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.13.3.4)
+    padrino-helpers (0.15.2)
+      i18n (>= 0.6.7, < 2)
+      padrino-support (= 0.15.2)
       tilt (>= 1.4.1, < 3)
-    padrino-support (0.13.3.4)
-      activesupport (>= 3.1)
+    padrino-support (0.15.2)
     parallel (1.20.1)
+    parslet (2.0.0)
     posix-spawn (0.3.15)
     public_suffix (4.0.6)
     pygments.rb (0.6.3)
@@ -202,14 +205,16 @@ GEM
       libv8 (~> 3.16.14.15)
       ref
     thor (1.1.0)
-    thread_safe (0.3.6)
     tilt (2.0.9)
+    toml (0.3.0)
+      parslet (>= 1.8.0, < 3.0.0)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.9)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
+    webrick (1.7.0)
     xcodeproj (1.21.0)
       CFPropertyList (>= 2.3.3, < 4.0)
       atomos (~> 0.1.3)
@@ -219,12 +224,13 @@ GEM
       rexml (~> 3.2.4)
     yajl-ruby (1.2.3)
     yard (0.8.6.2)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport (~> 5.0)
+  activesupport (~> 6.1)
   cocoapods (~> 1.0)
   concurrent-ruby
   foreman