diff --git a/.circleci/config.yml b/.circleci/config.yml
index f9fc3ff4f..ebbd18291 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ jobs:
   build:
     parallelism: 3
     docker:
-      - image: cimg/ruby:3.3.5-node-browsers
+      - image: cimg/ruby:3.1.6-node-browsers
         environment:
           BUNDLE_JOBS: 3
           BUNDLE_RETRY: 3
diff --git a/.github/workflows/standardrb.yml b/.github/workflows/standardrb.yml
index f81d83487..47bbee5a9 100644
--- a/.github/workflows/standardrb.yml
+++ b/.github/workflows/standardrb.yml
@@ -18,5 +18,5 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          ruby-version: "3.3.5"
+          ruby-version: "3.1.6"
           autofix: false
diff --git a/.ruby-version b/.ruby-version
index fa7adc7ac..9cec7165a 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.5
+3.1.6
diff --git a/.tool-versions b/.tool-versions
index fba182d8b..ef2e36e69 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
 nodejs 20.17.0
-ruby 3.3.5
+ruby 3.1.6
 yarn 1.22.22
diff --git a/Gemfile b/Gemfile
index 7a81c738e..f79c2907b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-ruby "3.3.5"
+ruby "3.1.6"
 
 git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
diff --git a/Gemfile.lock b/Gemfile.lock
index c958808f3..8a30b7d7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -705,7 +705,7 @@ DEPENDENCIES
   wrapped
 
 RUBY VERSION
-   ruby 3.3.5p100
+   ruby 3.1.6p260
 
 BUNDLED WITH
    2.5.18