diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4581bd8..b29e74d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,10 +11,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Ruby 2.6
+    - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6.10
+        ruby-version: 3.3.5
     - name: Build and test with Rake
       run: |
         gem install bundler
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index cf1446b..5c64e86 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Ruby 2.6
+    - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6.10
+        ruby-version: 3.3.5
     - name: Setup Rubygems
       env:
         RUBYGEMS_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..fa7adc7
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.3.5