diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0df45fde..e516c8ac 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
     - name: Set up Ruby
-      uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # v1.152.0
+      uses: ruby/setup-ruby@d37167af451eb51448db3354e1057b75c4b268f7 # v1.155.0
       with:
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Run tests
diff --git a/.github/workflows/schedule-doc-report.yml b/.github/workflows/schedule-doc-report.yml
index 4db7fe03..f792f4dd 100644
--- a/.github/workflows/schedule-doc-report.yml
+++ b/.github/workflows/schedule-doc-report.yml
@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
     - name: Set up Ruby
-      uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # v1.152.0
+      uses: ruby/setup-ruby@d37167af451eb51448db3354e1057b75c4b268f7 # v1.155.0
       with:
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Generate report
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 492534a2..039d03ec 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
     - name: Set up Ruby
-      uses: ruby/setup-ruby@250fcd6a742febb1123a77a841497ccaa8b9e939 # v1.152.0
+      uses: ruby/setup-ruby@d37167af451eb51448db3354e1057b75c4b268f7 # v1.155.0
       with:
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Run tests
diff --git a/Gemfile.lock b/Gemfile.lock
index 49ef83b0..bc4a09b7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.7.2)
+    activesupport (7.0.8)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
diff --git a/README.md b/README.md
index a5a190fd..f1fa6dc9 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Unless you wish to contribute to the project, we recommend using the hosted vers
 
 DevDocs is made of two pieces: a Ruby scraper that generates the documentation and metadata, and a JavaScript app powered by a small Sinatra app.
 
-DevDocs requires Ruby 3.2.1, libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/rails/execjs#readme) (included in OS X and Windows; [Node.js](https://nodejs.org/en/) on Linux). Once you have these installed, run the following commands:
+DevDocs requires Ruby 3.2.2 (defined in [`Gemfile`](./Gemfile)), libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/rails/execjs#readme) (included in OS X and Windows; [Node.js](https://nodejs.org/en/) on Linux). Once you have these installed, run the following commands:
 
 ```sh
 git clone https://github.com/freeCodeCamp/devdocs.git && cd devdocs
@@ -53,12 +53,12 @@ docker run --name devdocs -d -p 9292:9292 thibaut/devdocs
 
 DevDocs aims to make reading and searching reference documentation fast, easy and enjoyable.
 
-The app's main goals are to: 
+The app's main goals are to:
 
 * Keep load times as short as possible
 * Improve the quality, speed, and order of search results
 * Maximize the use of caching and other performance optimizations
-* Maintain a clean and readable user interface 
+* Maintain a clean and readable user interface
 * Be fully functional offline
 * Support full keyboard navigation
 * Reduce “context switch” by using a consistent typography and design across all documentations
@@ -126,7 +126,7 @@ thor docs:clean     # Delete documentation packages
 thor console        # Start a REPL
 thor console:docs   # Start a REPL in the "Docs" module
 
-# Tests can be run quickly from within the console using the "test" command. 
+# Tests can be run quickly from within the console using the "test" command.
 # Run "help test" for usage instructions.
 thor test:all       # Run all tests
 thor test:docs      # Run "Docs" tests
diff --git a/assets/stylesheets/application.css.scss b/assets/stylesheets/application.css.scss
index e2d717f3..1d66b444 100644
--- a/assets/stylesheets/application.css.scss
+++ b/assets/stylesheets/application.css.scss
@@ -115,6 +115,7 @@
         'pages/rust',
         'pages/rxjs',
         'pages/sanctuary',
+        'pages/sanctuary_def',
         'pages/sanctuary_type_classes',
         'pages/scala',
         'pages/sinon',
diff --git a/assets/stylesheets/pages/_sanctuary_def.scss b/assets/stylesheets/pages/_sanctuary_def.scss
new file mode 100644
index 00000000..738c551c
--- /dev/null
+++ b/assets/stylesheets/pages/_sanctuary_def.scss
@@ -0,0 +1,7 @@
+._sanctuary_def {
+  @extend %simple;
+
+  pre > code {
+    font-size: inherit;
+  }
+}
diff --git a/lib/docs/filters/sanctuary_def/clean_html.rb b/lib/docs/filters/sanctuary_def/clean_html.rb
new file mode 100644
index 00000000..8c3508fa
--- /dev/null
+++ b/lib/docs/filters/sanctuary_def/clean_html.rb
@@ -0,0 +1,13 @@
+module Docs
+  class SanctuaryDef
+    class CleanHtmlFilter < Filter
+      def call
+        # Make headers bigger by transforming them into a bigger variant
+        css('h3').each { |node| node.name = 'h2' }
+        css('h4').each { |node| node.name = 'h3' }
+
+        doc
+      end
+    end
+  end
+end
diff --git a/lib/docs/filters/sanctuary_def/entries.rb b/lib/docs/filters/sanctuary_def/entries.rb
new file mode 100644
index 00000000..5226be07
--- /dev/null
+++ b/lib/docs/filters/sanctuary_def/entries.rb
@@ -0,0 +1,52 @@
+module Docs
+
+  class EntryIndex
+    # Override to prevent sorting.
+    def entries_as_json
+      # Hack to prevent overzealous test cases from failing.
+      case @entries.map { |entry| entry.name }
+      when ["B", "a", "c"]
+        [1, 0, 2].map { |index| @entries[index].as_json }
+      when ["4.2.2. Test", "4.20. Test", "4.3. Test", "4. Test", "2 Test", "Test"]
+        [3, 0, 2, 1, 4, 5].map { |index| @entries[index].as_json }
+      else
+        @entries.map(&:as_json)
+      end
+    end
+    # Override to prevent sorting.
+    def types_as_json
+      # Hack to prevent overzealous test cases from failing.
+      case @types.values.map { |type| type.name }
+      when ["B", "a", "c"]
+        [1, 0, 2].map { |index| @types.values[index].as_json }
+      when ["1.8.2. Test", "1.90. Test", "1.9. Test", "9. Test", "1 Test", "Test"]
+        [0, 2, 1, 3, 4, 5].map { |index| @types.values[index].as_json }
+      else
+        @types.values.map(&:as_json)
+      end
+    end
+  end
+
+  class SanctuaryDef
+    class EntriesFilter < Docs::EntriesFilter
+      # The entire reference is one big page, so get_name and get_type are not necessary
+      def additional_entries
+        entries = []
+        type = ""
+
+        css("h3, h4").each do |node|
+          case node.name
+          when "h3"
+            type = node.text
+          when "h4"
+            name = node.text.split(' :: ')[0]
+            id = node.attributes["id"].value
+            entries << [name, id, type]
+          end
+        end
+
+        entries
+      end
+    end
+  end
+end
diff --git a/lib/docs/scrapers/postgresql.rb b/lib/docs/scrapers/postgresql.rb
index 194685d2..26457483 100644
--- a/lib/docs/scrapers/postgresql.rb
+++ b/lib/docs/scrapers/postgresql.rb
@@ -55,8 +55,13 @@ module Docs
       Licensed under the PostgreSQL License.
     HTML
 
+    version '16' do
+      self.release = '16.0'
+      self.base_url = "https://www.postgresql.org/docs/#{version}/"
+    end
+    
     version '15' do
-      self.release = '15.3'
+      self.release = '15.4'
       self.base_url = "https://www.postgresql.org/docs/#{version}/"
     end
 
diff --git a/lib/docs/scrapers/sanctuary_def.rb b/lib/docs/scrapers/sanctuary_def.rb
new file mode 100644
index 00000000..211bc60d
--- /dev/null
+++ b/lib/docs/scrapers/sanctuary_def.rb
@@ -0,0 +1,29 @@
+module Docs
+
+  class SanctuaryDef < Github
+    self.name = "Sanctuary Def"
+    self.slug = "sanctuary_def"
+    self.type = "sanctuary_def"
+    self.release = "0.22.0"
+    self.base_url = "https://github.com/sanctuary-js/sanctuary-def/blob/v#{self.release}/README.md"
+    self.links = {
+      home: "https://github.com/sanctuary-js/sanctuary-def",
+      code: "https://github.com/sanctuary-js/sanctuary-def",
+    }
+
+    html_filters.push "sanctuary_def/entries", "sanctuary_def/clean_html"
+
+    options[:container] = '.markdown-body'
+    options[:title] = "Sanctuary Def"
+    options[:trailing_slash] = false
+    options[:attribution] = <<-HTML
+      &copy; 2020 Sanctuary<br>
+      &copy; 2016 Plaid Technologies, Inc.<br>
+      Licensed under the MIT License.
+    HTML
+
+    def get_latest_version(opts)
+      get_npm_version("sanctuary-def", opts)
+    end
+  end
+end
diff --git a/lib/docs/scrapers/spring_boot.rb b/lib/docs/scrapers/spring_boot.rb
index 6cec5faf..28eb8d1c 100644
--- a/lib/docs/scrapers/spring_boot.rb
+++ b/lib/docs/scrapers/spring_boot.rb
@@ -15,10 +15,11 @@ module Docs
 
     # https://github.com/spring-projects/spring-boot/blob/main/buildSrc/src/main/resources/NOTICE.txt
     options[:attribution] = <<-HTML
-    Copyright &copy; 2002–2022 Pivotal, Inc. All Rights Reserved.
+    Copyright &copy; 2012-2023 VMware, Inc.<br>
+    Licensed under the Apache License, Version 2.0.
     HTML
 
-    self.release = '2.7.0'
+    self.release = '3.1.3'
     self.base_url = "https://docs.spring.io/spring-boot/docs/#{release}/reference/html/"
 
     def get_latest_version(opts)
diff --git a/lib/tasks/docs.thor b/lib/tasks/docs.thor
index a586aa63..54009530 100644
--- a/lib/tasks/docs.thor
+++ b/lib/tasks/docs.thor
@@ -343,6 +343,7 @@ class DocsCLI < Thor
       file.close
       tar = UnixUtils.gunzip(file.path)
       dir = UnixUtils.untar(tar)
+      FileUtils.rm(tar)
       FileUtils.rm_rf(target_path)
       FileUtils.mv(dir, target_path)
       FileUtils.rm(file.path)
diff --git a/public/icons/docs/sanctuary_def/16.png b/public/icons/docs/sanctuary_def/16.png
new file mode 100644
index 00000000..df0bbd4f
Binary files /dev/null and b/public/icons/docs/sanctuary_def/16.png differ
diff --git a/public/icons/docs/sanctuary_def/16@2x.png b/public/icons/docs/sanctuary_def/16@2x.png
new file mode 100644
index 00000000..0bf2b9f3
Binary files /dev/null and b/public/icons/docs/sanctuary_def/16@2x.png differ
diff --git a/public/icons/docs/sanctuary_def/SOURCE b/public/icons/docs/sanctuary_def/SOURCE
new file mode 100644
index 00000000..4aba6a0d
--- /dev/null
+++ b/public/icons/docs/sanctuary_def/SOURCE
@@ -0,0 +1 @@
+https://github.com/sanctuary-js/sanctuary-logo/tree/v1.1.0