diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 55cbcb952e..5740532237 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -53,7 +53,13 @@ jobs:
         ruby-version: ${{ matrix.ruby }}
 
     - name: Install dependencies
-      run: bundle install
+      run:  |
+        if [[ "${{ matrix.ruby }}" < "3.1" ]]; then
+          gem install bundler:2.4.22
+          bundle _2.4.22_ install
+        else
+          bundle install
+        fi
 
     - name: Run tests
       run: bundle exec rake test
diff --git a/Gemfile b/Gemfile
index f42af99f61..fdb7b2c838 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,9 +6,11 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'benchmark'
+gem 'irb'
 gem 'minitest', '5.26.1'
 gem 'pry', '0.15.2'
 gem 'rake', '13.3.1'
+gem 'rdoc'
 gem 'rubocop', '1.81.7'
 gem 'rubocop-minitest', '0.38.2'
 gem 'rubocop-rake', '0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 38daf95a60..1e694fd9a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,9 +11,16 @@ GEM
     benchmark (0.5.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.5)
+    date (3.5.1)
     docile (1.4.1)
+    erb (6.0.1)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.16.0)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
     json (2.16.0)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
@@ -24,14 +31,26 @@ GEM
       ast (~> 2.4.1)
       racc
     power_assert (3.0.1)
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
     prism (1.6.0)
     pry (0.15.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    psych (5.3.1)
+      date
+      stringio
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.3.1)
+    rdoc (7.0.3)
+      erb
+      psych (>= 4.0.0)
+      tsort
     regexp_parser (2.11.3)
+    reline (0.6.3)
+      io-console (~> 0.5)
     rubocop (1.81.7)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
@@ -60,9 +79,11 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
+    stringio (3.2.0)
     test-unit (3.7.1)
       power_assert
     timecop (0.9.10)
+    tsort (0.2.0)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.1.0)
@@ -75,9 +96,11 @@ PLATFORMS
 DEPENDENCIES
   benchmark
   faker!
+  irb
   minitest (= 5.26.1)
   pry (= 0.15.2)
   rake (= 13.3.1)
+  rdoc
   rubocop (= 1.81.7)
   rubocop-minitest (= 0.38.2)
   rubocop-rake (= 0.7.1)
@@ -87,4 +110,4 @@ DEPENDENCIES
   yard (= 0.9.37)
 
 BUNDLED WITH
-   2.4.22
+  4.0.3