diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index ba148e5..9360530 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.7', '3.0', '3.1', '3.2' ]
+        ruby: [ '2.7', '3.0', '3.1', '3.2', '3.3' ]
     env:
       RUBY_IMAGE: ${{ matrix.ruby }} # The image used in the Dockerfile
     name: Ruby ${{ matrix.ruby }}
diff --git a/docker-compose.yml b/docker-compose.yml
index 47a90cd..a8750eb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,6 +1,6 @@
 services:
   app:
-    image: ruby:${RUBY_IMAGE:-3.2}-buster
+    image: ruby:${RUBY_IMAGE:-3.2}
     environment:
       - GEM_HOME=/bundle
       - BUNDLE_PATH=/bundle