diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5f776c..943b111 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,10 +45,10 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.3.0
+          ruby-version: 3.1.6
 
       - name: Cache gems
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: vendor/bundle
           key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
diff --git a/.ruby-version b/.ruby-version
index 15a2799..9cec716 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.0
+3.1.6
diff --git a/Gemfile b/Gemfile
index a60e8bf..113c3da 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby "3.3.0"
+ruby "3.1.6"
 
 gem "rails"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 3396bc7..ceb8fe1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -252,7 +252,7 @@ DEPENDENCIES
   sinatra
 
 RUBY VERSION
-   ruby 3.3.0
+   ruby 3.1.6
 
 BUNDLED WITH
-   2.5.3
+   2.3.27