diff --git a/.circleci/config.yml b/.circleci/config.yml
index baeff9f..352503b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,15 +1,13 @@
-version: 2
+version: 2.1
+orbs:
+  ruby: circleci/ruby@2.1.3
 jobs:
   default: &default
-    working_dir: hackathon
+    working_directory: hackathon
     environment:
       REPORT_DIR: /report
     docker:
-      - image: reproio/ruby_with_terraform:0.11.0
-        environment:
-          - LC_ALL: C.UTF-8
-          - LANG: ja_JP.UTF-8
-          - LANGUAGE: ja_JP.UTF-8
+      - image: hashicorp/terraform
     steps:
       - checkout
   plan:
@@ -19,6 +17,9 @@ jobs:
       - run:
           name: terraform version
           command: "terraform --version"
+      - ruby/install:
+          version: '3.3.4'
+      - run: echo "Ruby 3.3.4 has been installed"
       - run:
           name: echo ruby information
           command: |