diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index c95d172079..0a8ea7989a 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ["2.7", "3.0", "3.1", "3.2", "3.3"]
+        ruby-version: ["2.7", "3.0", "3.1", "3.2", "3.3", "3.4"]
 
     steps:
       - uses: actions/checkout@v4
@@ -54,7 +54,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.3"
+          ruby-version: "3.4"
           bundler-cache: true
       - name: Profile Memory Allocation
         run: bundle exec rake check:memory
diff --git a/Gemfile b/Gemfile
index 2e880cdc6e..b66851e8a3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -35,4 +35,7 @@ group :development do
   # Ruby 3 no longer ships with a web server
   gem 'puma' if RUBY_VERSION >= '3'
   gem 'shotgun'
+
+  gem "mutex_m" if RUBY_VERSION >= '3.4'
+  gem "base64" if RUBY_VERSION >= '3.4'
 end