diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 2d83f9c2..fcf4bc0a 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -3,5 +3,6 @@ version: 2
 updates:
   - package-ecosystem: 'bundler'
     directory: '/'
+    open-pull-requests-limit: 20
     schedule:
       interval: 'monthly'
diff --git a/.ruby-version b/.ruby-version
index 6ebad148..a423d421 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.2
\ No newline at end of file
+3.4.2
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index c4bf3c45..0b991c1a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM    ruby:2.7
+FROM    ruby:3.4
 EXPOSE  3000
 WORKDIR /usr/src/app
 COPY    Gemfile /usr/src/app/
diff --git a/Gemfile b/Gemfile
index 17518ce5..1ae0db35 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'nanoc', '~> 4.12'
+gem 'nanoc', '~> 4.13'
 gem 'adsf'
 gem 'kramdown'
 gem 'guard-nanoc'
diff --git a/Gemfile.lock b/Gemfile.lock
index 9a9d5a4d..0f8fc869 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,18 +1,19 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.1)
-      public_suffix (>= 2.0.2, < 6.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     adsf (1.4.6)
       rack (>= 1.0.0, < 3.0.0)
+    base64 (0.2.0)
     builder (3.3.0)
     coderay (1.1.3)
     colored (1.2)
-    concurrent-ruby (1.2.2)
-    cri (2.15.11)
-    ddmetrics (1.0.1)
+    concurrent-ruby (1.3.5)
+    cri (2.15.12)
+    ddmetrics (1.1.0)
     ddplugin (1.0.3)
-    diff-lcs (1.5.0)
+    diff-lcs (1.6.0)
     em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -39,9 +40,10 @@ GEM
       guard-compat (~> 1.0)
       nanoc-cli (~> 4.11, >= 4.11.14)
       nanoc-core (~> 4.11, >= 4.11.14)
-    hamster (3.0.0)
-      concurrent-ruby (~> 1.0)
     http_parser.rb (0.6.0)
+    immutable-ruby (0.2.0)
+      concurrent-ruby (~> 1.1)
+      sorted_set (~> 1.0)
     json_schema (0.21.0)
     kramdown (2.4.0)
       rexml
@@ -49,36 +51,37 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     lumberjack (1.2.8)
-    memo_wise (1.7.0)
+    memo_wise (1.11.0)
     method_source (1.0.0)
     mini_portile2 (2.8.1)
     multi_json (1.15.0)
-    nanoc (4.12.15)
+    nanoc (4.13.3)
       addressable (~> 2.5)
       colored (~> 1.2)
       nanoc-checking (~> 1.0, >= 1.0.2)
-      nanoc-cli (= 4.12.15)
-      nanoc-core (= 4.12.15)
+      nanoc-cli (= 4.13.3)
+      nanoc-core (= 4.13.3)
       nanoc-deploying (~> 1.0)
       parallel (~> 1.12)
       tty-command (~> 0.8)
       tty-which (~> 0.4)
-    nanoc-checking (1.0.2)
-      nanoc-cli (~> 4.12, >= 4.12.4)
-      nanoc-core (~> 4.12, >= 4.12.4)
-    nanoc-cli (4.12.15)
+    nanoc-checking (1.0.5)
+      nanoc-cli (~> 4.12, >= 4.12.5)
+      nanoc-core (~> 4.12, >= 4.12.5)
+    nanoc-cli (4.13.3)
       cri (~> 2.15)
       diff-lcs (~> 1.3)
-      nanoc-core (= 4.12.15)
+      nanoc-core (= 4.13.3)
+      pry
       zeitwerk (~> 2.1)
-    nanoc-core (4.12.15)
+    nanoc-core (4.13.3)
+      base64 (~> 0.2)
       concurrent-ruby (~> 1.1)
       ddmetrics (~> 1.0)
       ddplugin (~> 1.0)
-      hamster (~> 3.0)
+      immutable-ruby (~> 0.1)
       json_schema (~> 0.19)
       memo_wise (~> 1.5)
-      psych (~> 4.0)
       slow_enumerator_tools (~> 1.0)
       tty-platform (~> 0.2)
       zeitwerk (~> 2.1)
@@ -93,15 +96,13 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    parallel (1.22.1)
+    parallel (1.26.3)
     pastel (0.8.0)
       tty-color (~> 0.5)
     pry (0.14.0)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    psych (4.0.6)
-      stringio
-    public_suffix (5.0.1)
+    public_suffix (6.0.1)
     pygments.rb (3.0.0)
     racc (1.6.2)
     rack (2.2.13)
@@ -110,6 +111,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    rbtree (0.4.6)
     redcarpet (3.6.0)
     rexml (3.3.9)
     rspec (3.12.0)
@@ -126,16 +128,19 @@ GEM
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
     semverse (3.0.2)
+    set (1.1.1)
     shellany (0.0.1)
     slow_enumerator_tools (1.1.0)
-    stringio (3.0.5)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
     thor (1.1.0)
     tty-color (0.6.0)
     tty-command (0.10.1)
       pastel (~> 0.8)
     tty-platform (0.3.0)
     tty-which (0.5.0)
-    zeitwerk (2.6.7)
+    zeitwerk (2.7.2)
 
 PLATFORMS
   ruby
@@ -146,7 +151,7 @@ DEPENDENCIES
   guard-livereload
   guard-nanoc
   kramdown
-  nanoc (~> 4.12)
+  nanoc (~> 4.13)
   nokogiri
   pygments.rb
   rb-fchange
@@ -157,4 +162,4 @@ DEPENDENCIES
   semverse
 
 BUNDLED WITH
-   2.1.4
+   2.6.5
diff --git a/Makefile b/Makefile
index df485672..f8cb59e4 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,8 @@ build: clean downloads compile
 
 bundle:
 	bundle config build.nokogiri --use-system-libraries
-	bundle install --path vendor
+	bundle config set path vendor
+	bundle install
 
 clean:
 	rm -rf output downloads
diff --git a/lib/helpers/download.rb b/lib/helpers/download.rb
index 85c0649f..f529dc72 100644
--- a/lib/helpers/download.rb
+++ b/lib/helpers/download.rb
@@ -38,7 +38,7 @@ module Downloads
 
       if asset
         cache = ['downloads', '.cache', release.id, 'sha256sums.txt'].join('/')
-        unless File.exists?(cache)
+        unless File.exist?(cache)
           FileUtils.mkdir_p(File.dirname(cache))
           File.open(cache, 'wb') do |file|
             file.write(URI.parse(asset['browser_download_url']).read)