diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 5a49da0..fe3ebe5 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -20,15 +20,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        ruby: [2.6, 2.7, 3.0]
+        ruby: [2.6, 2.7, 3.0, 3.1, 3.2, 3.3]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Ruby
     # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
     # change this to (see https://github.com/ruby/setup-ruby#versioning):
     # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@fdcfbcf14ec9672f6f615cb9589a1bc5dd69d262
+      uses: ruby/setup-ruby@1
       with:
         ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies
diff --git a/.ruby-version b/.ruby-version
index ef538c2..15a2799 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.2
+3.3.0