diff --git a/.github/workflows/ci-build-and-install-gem.yml b/.github/workflows/ci-build-and-install-gem.yml
index f6b10be..8500e38 100644
--- a/.github/workflows/ci-build-and-install-gem.yml
+++ b/.github/workflows/ci-build-and-install-gem.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7.3
+        ruby-version: 3.1.2
 
     - name: Build and install gem
       run: gem build *.gemspec && gem install *.gem
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 968e6c6..db91d1b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,11 +12,11 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { ruby: 2.6.7 }
-          - { ruby: 2.7.3 }
-          - { ruby: 3.0.1 }
+          - { ruby: 2.7.6 }
+          - { ruby: 3.0.4 }
+          - { ruby: 3.1.2 }
           - { ruby: head, allow-failure: true }
-          - { ruby: jruby-9.2.17.0 }
+          - { ruby: jruby-9.3.4.0 }
           - { ruby: jruby-head, allow-failure: true }
 
     steps:
diff --git a/.ruby-version b/.ruby-version
index 1effb00..8c50098 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7
+3.1