diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index fe47348c0..f9db60ef5 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        ruby: [ 2.6, 2.5, 2.4 ]
+        ruby: [ 3.0, 2.7, 2.6, ruby-head ]
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a76aa0c87..d2836a272 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
-        ruby: [ 2.6, 2.5, 2.4, 2.3, 2.2, jruby, jruby-head, truffleruby, ruby-head ]
+        ruby: [ '3.0', 2.7, 2.6, 2.5, 2.4, 2.3, 2.2, jruby, jruby-head, truffleruby, ruby-head ]
         exclude:
           - os: windows-latest
             ruby: truffleruby
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 61b87313c..d2843c9c3 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        ruby: [ 2.6, 2.5, 2.4 ]
+        ruby: [ 3.0, 2.7, 2.6, ruby-head ]
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1