diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 72e4ff1..82534c2 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -1,20 +1,26 @@
 name: Testing on Ubuntu
 on:
-  - push
-  - pull_request
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '0 0 1 * *'
 jobs:
+  ruby-versions:
+    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
+    with:
+      engine: cruby
+      min_version: 2.7
   build:
+    needs: ruby-versions
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        ruby:
-          - 2.7
-          - "3.0"
-          - 3.1
-          - 3.2
-          - 3.3
-          - 3.4
+        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
+        exclude:
+          - ruby: head
         os:
           - ubuntu-latest
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}
@@ -28,7 +34,5 @@ jobs:
       env:
         CI: true
       run: |
-        gem install bundler -v 2.4.22
-        gem install rake
-        bundle _2.4.22_ install --jobs 4 --retry 3
+        bundle install --jobs 4 --retry 3
         bundle exec rake test
diff --git a/fluent-plugin-filter-split.gemspec b/fluent-plugin-filter-split.gemspec
index 54d8024..4338f18 100644
--- a/fluent-plugin-filter-split.gemspec
+++ b/fluent-plugin-filter-split.gemspec
@@ -20,8 +20,8 @@ Gem::Specification.new do |spec|
   spec.test_files    = test_files
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 2.4.19"
-  spec.add_development_dependency "rake", "~> 13.0.6"
+  spec.add_development_dependency "bundler"
+  spec.add_development_dependency "rake"
   spec.add_development_dependency "test-unit", "~> 3.6.1"
   spec.add_runtime_dependency "fluentd", [">= 0.14.10", "< 2"]
 end