diff --git a/.github/workflows/ci-test.yml b/.github/workflows/ci-test.yml
index 2f7a9a8b..841ac988 100644
--- a/.github/workflows/ci-test.yml
+++ b/.github/workflows/ci-test.yml
@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.0"
+        ruby-version: "3.1"
         bundler-cache: true
     - run: bundle exec rake rubocop
 
@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ["2.5", "2.6", "2.7", "3.0", "jruby", "truffleruby-head"]
+        ruby-version: ["2.5", "2.6", "2.7", "3.0", "3.1", "head", "jruby", "truffleruby-head"]
 
     runs-on: ubuntu-latest
     steps:
@@ -48,6 +48,6 @@ jobs:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.0"
+        ruby-version: "3.1"
         bundler-cache: true
     - run: bundle exec rake test