diff --git a/.circleci/config.yml b/.circleci/config.yml
index c57f6ccda..c7f180a80 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -9,7 +9,7 @@ orbs:
 jobs:
   build-python:
     docker:
-      - image: cimg/ruby:3.4.8-browsers
+      - image: cimg/ruby:4.0.1-browsers
     working_directory: ~/repo
     steps:
       - checkout
@@ -44,7 +44,7 @@ jobs:
 
   build:
     docker:
-      - image: cimg/ruby:3.4.8-browsers
+      - image: cimg/ruby:4.0.1-browsers
     working_directory: ~/repo
     steps:
       - checkout
@@ -112,7 +112,7 @@ jobs:
 
   well-formed:
     docker:
-      - image: cimg/ruby:3.4.8-node
+      - image: cimg/ruby:4.0.1-node
     working_directory: ~/repo
     steps:
       - checkout
@@ -129,7 +129,7 @@ jobs:
 
   built-in-datatypes:
     docker:
-      - image: cimg/ruby:3.4.8-node
+      - image: cimg/ruby:4.0.1-node
     working_directory: ~/repo
     steps:
       - checkout
@@ -146,7 +146,7 @@ jobs:
 
   spelling:
     docker:
-      - image: cimg/ruby:3.4.8-node
+      - image: cimg/ruby:4.0.1-node
     working_directory: ~/repo
     steps:
       - checkout