diff --git a/Gemfile.lock b/Gemfile.lock
index d262b7a..9544a3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,84 +4,113 @@ PATH
     raddocs (2.3.0)
       haml (>= 4.0)
       json
-      sinatra (~> 2.0)
+      sinatra (>= 3.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
-    capybara (2.14.4)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.9)
+    capybara (2.18.0)
       addressable
-      mime-types (>= 1.16)
+      mini_mime (>= 0.1.3)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    coderay (1.1.1)
-    diff-lcs (1.3)
-    haml (5.0.1)
-      temple (>= 0.8.0)
+      xpath (>= 2.0, < 4.0)
+    coderay (1.1.3)
+    diff-lcs (1.6.1)
+    haml (6.3.0)
+      temple (>= 0.8.2)
+      thor
       tilt
-    inch (0.7.1)
+    inch (0.8.0)
       pry
       sparkr (>= 0.2.0)
       term-ansicolor
-      yard (~> 0.8.7.5)
-    json (2.1.0)
-    kramdown (1.14.0)
-    method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.2.0)
-    mustermann (1.0.0)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
-    pry (0.10.4)
-      coderay (~> 1.1.0)
-      method_source (~> 0.8.1)
-      slop (~> 3.4)
-    public_suffix (2.0.5)
-    rack (2.0.3)
-    rack-protection (2.0.0)
-      rack
-    rack-test (0.7.0)
+      yard (~> 0.9.12)
+    json (2.10.2)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
+    method_source (1.1.0)
+    mini_mime (1.1.5)
+    mustermann (3.0.3)
+      ruby2_keywords (~> 0.0.1)
+    nokogiri (1.18.7-aarch64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.7-aarch64-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.7-arm-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.7-arm-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.7-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.7-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.7-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.7-x86_64-linux-musl)
+      racc (~> 1.4)
+    pry (0.15.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    public_suffix (6.0.1)
+    racc (1.8.1)
+    rack (2.2.13)
+    rack-protection (3.2.0)
+      base64 (>= 0.1.0)
+      rack (~> 2.2, >= 2.2.4)
+    rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rake (10.5.0)
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
+    rexml (3.4.1)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
-    sinatra (2.0.0)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
+    ruby2_keywords (0.0.5)
+    sinatra (3.2.0)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.2.0)
       tilt (~> 2.0)
-    slop (3.6.0)
     sparkr (0.4.1)
-    temple (0.8.0)
-    term-ansicolor (1.6.0)
+    sync (0.5.0)
+    temple (0.10.3)
+    term-ansicolor (1.11.2)
       tins (~> 1.0)
-    tilt (2.0.8)
-    tins (1.15.0)
-    xpath (2.1.0)
-      nokogiri (~> 1.3)
-    yard (0.8.7.6)
+    thor (1.3.2)
+    tilt (2.6.0)
+    tins (1.38.0)
+      bigdecimal
+      sync
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
+    yard (0.9.37)
     yard-sinatra (1.0.0)
       yard (~> 0.7)
 
 PLATFORMS
-  ruby
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
 
 DEPENDENCIES
   capybara (~> 2.3)
@@ -95,4 +124,4 @@ DEPENDENCIES
   yard-sinatra
 
 BUNDLED WITH
-   1.15.3
+   2.6.6
diff --git a/lib/raddocs/app.rb b/lib/raddocs/app.rb
index cc169ab..5873636 100644
--- a/lib/raddocs/app.rb
+++ b/lib/raddocs/app.rb
@@ -8,7 +8,7 @@ class << self
 end
 
 begin
-  require 'kramdown'
+  require "kramdown"
 
   Raddocs::App.markdown = true
 rescue LoadError
@@ -18,13 +18,13 @@ class << self
 module Raddocs
   # Sinatra app that serves all documentation
   class App < Sinatra::Base
-    set :haml, :format => :html5
+    set :haml, format: :html5, escape_html: false
     set :root, File.join(File.dirname(__FILE__), "..")
 
     # Main index, displays all examples grouped by resource
     get "/" do
       index = Index.new(File.join(docs_dir, "index.json"))
-      haml :index, :locals => { :index => index }
+      haml :index, locals: { index: index }
     end
 
     # Allows for overriding styles
@@ -47,7 +47,7 @@ class App < Sinatra::Base
     end
 
     # Catch all for example pages.
-    # Loads files from the docs dir and appends '.json'.
+    # Loads files from the docs dir and appends ".json".
     #
     # @example
     #   "/orders/create_an_order" => "docs/api/orders/create_an_order.json"
@@ -80,8 +80,8 @@ def url_location
 
       def url_prefix
         url = Raddocs.configuration.url_prefix
-        return '' if url.to_s.empty?
-        url.start_with?('/') ? url : "/#{url}"
+        return "" if url.to_s.empty?
+        url.start_with?("/") ? url : "/#{url}"
       end
 
       def api_name
diff --git a/raddocs.gemspec b/raddocs.gemspec
index 49c371e..a4c31ce 100644
--- a/raddocs.gemspec
+++ b/raddocs.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = ">= 1.3.6"
 
-  s.add_runtime_dependency "sinatra", "~> 2.0"
+  s.add_runtime_dependency "sinatra", ">= 3.0"
   s.add_runtime_dependency "haml", ">= 4.0"
   s.add_runtime_dependency "json"