diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 4a025e3..4a105a3 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -16,8 +16,8 @@ jobs:
           - 'ubuntu-20.04'
           - 'alpine-3.17'
         package_ruby_ver:
-          - '3.1.6'
-          - '3.2.4'
+          - '3.2.5'
+          - '3.3.4'
     container:
       image: ghcr.io/tamatebako/tebako-${{ matrix.container }}:latest
     steps: