diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8ea702f..75838d9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3'
       - uses: actions/cache@v1
         with:
           path: vendor/bundle
diff --git a/.ruby-version b/.ruby-version
index a603bb5..be94e6f 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7.5
+3.2.2
diff --git a/Gemfile b/Gemfile
index c1de96e..41bdff7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,4 +13,5 @@ group :test do
   gem 'timecop'
   gem 'vcr'
   gem 'webmock'
+  gem 'rexml'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index e4ef3ac..36d08f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,11 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.3)
+    activesupport (6.0.6.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     chronic (0.10.2)
@@ -50,12 +51,13 @@ GEM
     llhttp-ffi (0.4.0)
       ffi-compiler (~> 1.0)
       rake (~> 13.0)
-    minitest (5.14.1)
+    minitest (5.20.0)
     multipart-post (2.1.1)
     octokit (4.12.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     public_suffix (4.0.6)
     rake (13.0.6)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -81,11 +83,12 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8)
-    vcr (6.0.0)
+    vcr (6.2.0)
     webmock (3.4.2)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
+    zeitwerk (2.6.12)
 
 PLATFORMS
   ruby
@@ -96,13 +99,14 @@ DEPENDENCIES
   http
   octokit
   rake
+  rexml
   rspec
   timecop
   vcr
   webmock
 
 RUBY VERSION
-   ruby 2.7.5p203
+   ruby 3.2.2p53
 
 BUNDLED WITH
-   2.1.4
+   2.4.2