diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index a20c897..1df47cf 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -19,6 +19,7 @@ jobs:
     name: ${{ matrix.ruby }} ${{ matrix.gemfile }} rake ${{ matrix.task }}
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
+      RUBYOPT: "--enable-frozen-string-literal"
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
diff --git a/Gemfile.lock b/Gemfile.lock
index 100355e..3f5644a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     connection_pool (2.4.1)
     diff-lcs (1.3)
     drb (2.2.1)
-    forking_test_runner (1.3.0)
+    forking_test_runner (1.14.0)
       parallel_tests (>= 1.3.7)
     forwardable (1.3.3)
     i18n (1.14.5)
@@ -39,8 +39,8 @@ GEM
     mini_portile2 (2.8.6)
     minitest (5.23.0)
     mutex_m (0.2.0)
-    parallel (1.21.0)
-    parallel_tests (2.27.0)
+    parallel (1.26.3)
+    parallel_tests (4.7.1)
       parallel
     parser (3.1.0.0)
       ast (~> 2.4.1)
diff --git a/Rakefile b/Rakefile
index 3748e6b..5629a4b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -33,9 +33,9 @@ task :rubocop do
   sh "rubocop"
 end
 
-desc "Bundle all"
+desc "Bundle all CMD="
 task :bundle_all do
   Dir["gemfiles/*.gemfile"].each do |gemfile|
-    Bundler.with_original_env { sh "BUNDLE_GEMFILE=#{gemfile} bundle" }
+    Bundler.with_original_env { sh "BUNDLE_GEMFILE=#{gemfile} bundle #{ENV["CMD"]}" }
   end
 end
diff --git a/gemfiles/rails71.gemfile.lock b/gemfiles/rails71.gemfile.lock
index a5e14e7..c2864ca 100644
--- a/gemfiles/rails71.gemfile.lock
+++ b/gemfiles/rails71.gemfile.lock
@@ -93,7 +93,7 @@ GEM
     diff-lcs (1.5.1)
     drb (2.2.1)
     erubi (1.12.0)
-    forking_test_runner (1.13.0)
+    forking_test_runner (1.14.0)
       parallel_tests (>= 1.3.7)
     forwardable (1.3.3)
     globalid (1.2.1)
@@ -134,7 +134,7 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.5-x86_64-linux)
       racc (~> 1.4)
-    parallel (1.24.0)
+    parallel (1.26.3)
     parallel_tests (4.7.1)
       parallel
     parser (3.3.1.0)