diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4a909720..c041579e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.7', '3.0.1' ]
+        ruby: [ '3.1.6','3.2.4' ]
     name: Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v3
diff --git a/.ruby-version b/.ruby-version
index 860487ca..0aec50e6 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7.1
+3.1.4
diff --git a/Gemfile.lock b/Gemfile.lock
index a7bf45bc..9fd69f18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,22 +1,22 @@
 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)
     builder (3.2.4)
     colorator (1.1.0)
-    concurrent-ruby (1.1.10)
+    concurrent-ruby (1.3.3)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.15.5)
+    ffi (1.17.0)
     forwardable-extended (2.6.0)
-    google-protobuf (3.23.0)
+    google-protobuf (3.25.3)
     http_parser.rb (0.8.0)
-    i18n (1.12.0)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    jekyll (4.3.1)
+    jekyll (4.3.3)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -45,28 +45,30 @@ GEM
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    liquid (4.0.3)
-    listen (3.7.1)
+    liquid (4.0.4)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.1)
-    rake (13.0.6)
+    public_suffix (6.0.0)
+    rake (13.2.1)
     rb-fsevent (0.11.2)
-    rb-inotify (0.10.1)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
-    rouge (4.0.1)
+    rexml (3.3.1)
+      strscan
+    rouge (4.3.0)
     safe_yaml (1.0.5)
-    sass-embedded (1.62.1)
-      google-protobuf (~> 3.21)
-      rake (>= 10.0.0)
+    sass-embedded (1.69.5)
+      google-protobuf (~> 3.23)
+      rake (>= 13.0.0)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
-    unicode-display_width (2.3.0)
-    webrick (1.7.0)
+    unicode-display_width (2.5.0)
+    webrick (1.8.1)
 
 PLATFORMS
   ruby
@@ -79,4 +81,4 @@ DEPENDENCIES
   jekyll-paginate
 
 BUNDLED WITH
-   2.2.23
+   2.5.14
diff --git a/_plugins/sitemap_generator.rb b/_plugins/sitemap_generator.rb
index f9113427..447833cd 100644
--- a/_plugins/sitemap_generator.rb
+++ b/_plugins/sitemap_generator.rb
@@ -126,7 +126,7 @@ module Jekyll
     def fill_pages(site, urlset)
       site.pages.each do |page|
         if !excluded?(site, page.path_to_source)
-          if File.exists?(page.path)
+          if File.exist?(page.path)
             url = fill_url(site, page)
             urlset.add_element(url)
           end
diff --git a/netlify.toml b/netlify.toml
index a295a1ed..4bcdb178 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -3,7 +3,7 @@
   command = "jekyll build --trace --limit-posts 10"
 
 [build.environment]
-  RUBY_VERSION = "2.7.1"
+  RUBY_VERSION = "3.1.4"
 
 [build.processing]
-  skip_processing = true
\ No newline at end of file
+  skip_processing = true