diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 392e45c0..106cf67a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,6 +32,7 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         experimental: [false]
         include:
           - ruby-version: 'ruby-head'
@@ -61,6 +62,7 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         experimental: [false]
         include:
           - ruby-version: 'ruby-head'
@@ -90,6 +92,7 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         experimental: [false]
         include:
           - ruby-version: 'ruby-head'
@@ -119,6 +122,7 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         experimental: [false]
         include:
           - ruby-version: 'ruby-head'
@@ -146,7 +150,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.2'
+          ruby-version: '3.3'
           bundler-cache: true
           cache-version: 1
       - name: Run markdownlint