diff --git a/.ruby-version b/.ruby-version
index 5154b3f..eb39e53 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.6
+3.3
diff --git a/Gemfile b/Gemfile
index 4b37d1c..4bd6037 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,9 @@
 source 'https://rubygems.org'
 
+# These were previously included in Ruby, but will be removed as of Ruby 3.4
+gem 'base64', '~> 0.2.0'
+gem 'bigdecimal', '~> 3.1.8'
+
 gem 'jekyll-multiple-languages-plugin',
     github: 'perlun/jekyll-multiple-languages-plugin',
     ref: '1c149891788aa5f50cb9c469f93fa15c61a14419'
diff --git a/Gemfile.lock b/Gemfile.lock
index c564c99..a40270a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,6 +17,8 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.8)
     colorator (1.1.0)
     concurrent-ruby (1.3.3)
     csv (3.3.0)
@@ -69,8 +71,6 @@ GEM
     nokogiri (1.13.10)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.13.10-x86_64-linux)
-      racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (5.1.1)
@@ -100,6 +100,8 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  base64 (~> 0.2.0)
+  bigdecimal (~> 3.1.8)
   ffi (< 1.17.0)
   jekyll (~> 3.10)
   jekyll-multiple-languages-plugin!
@@ -110,4 +112,4 @@ DEPENDENCIES
   redcarpet (~> 3.6)
 
 BUNDLED WITH
-   2.3.20
+   2.5.16
diff --git a/_config.yml b/_config.yml
index 9faddb6..015e49b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -28,7 +28,7 @@ exclude:
 languages: ["xx", "sv", "en"]
 exclude_from_localizations: ["images", "public"]
 
-gems:
+plugins:
   - jekyll-multiple-languages-plugin
   - jekyll-paginate
   - jemoji