diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aaea924191..8942ecf288 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,35 +5,28 @@ on:
 - pull_request
 
 jobs:
+  ruby-versions:
+    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
+    with:
+      min_version: 2.4
+
   host:
+    needs: ruby-versions
     name: ${{ matrix.os }} ${{ matrix.ruby }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
+        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         os:
           - ubuntu-latest
           - macos-latest
           - windows-latest
-        ruby:
-          - '2.4'
-          - '2.5'
-          - '2.6'
-          - '2.7'
-          - '3.0'
-          - '3.1'
-          - '3.2'
-          - debug
-          # We need to update 'jruby-XXX' in "if:" too when we update
-          # this.
-          - jruby-9.4.5.0
-          - truffleruby
-          - truffleruby-head
         include:
           - { os: windows-latest , ruby: mingw }
           - { os: windows-latest , ruby: mswin }
         exclude:
-          - { os: windows-latest , ruby: debug }
+          - { os: windows-latest , ruby: head }
           - { os: windows-latest , ruby: truffleruby }
           - { os: windows-latest , ruby: truffleruby-head }
 
@@ -52,7 +45,7 @@ jobs:
       # "gem install pkg/*.gem" fails.
       - run: bundle exec rake version:bump
         if: >-
-          matrix.ruby == 'debug' ||
+          matrix.ruby == 'head' ||
           matrix.ruby == 'mingw' ||
           matrix.ruby == 'mswin'
 
@@ -61,7 +54,7 @@ jobs:
       - uses: actions/upload-artifact@v4
         if: >-
           matrix.os == 'ubuntu-latest' &&
-            (matrix.ruby == '3.1' || matrix.ruby == 'jruby-9.4.5.0')
+            (matrix.ruby == '3.3' || matrix.ruby == 'jruby')
         with:
           name: gem-${{ matrix.os }}-${{ matrix.ruby }}
           path: pkg/
@@ -70,7 +63,7 @@ jobs:
         if: >-
           startsWith(github.ref, 'refs/tags/') &&
             matrix.os == 'ubuntu-latest' &&
-            (matrix.ruby == '3.1' || matrix.ruby == 'jruby-9.4.5.0')
+            (matrix.ruby == '3.3' || matrix.ruby == 'jruby')
         run: |
           ruby \
             -e 'print("## strscan "); \