diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d19c412..b0234f0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [3.2, 3.1, 3.0, 2.7, 2.6, 2.5, 2.4, 2.3]
+        ruby-version: ["3.3", "3.2", "3.1", "3.0", "2.7", "2.6"]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/lib/next_rails/bundle_report/ruby_version_compatibility.rb b/lib/next_rails/bundle_report/ruby_version_compatibility.rb
index 40ca2cf..414cf39 100644
--- a/lib/next_rails/bundle_report/ruby_version_compatibility.rb
+++ b/lib/next_rails/bundle_report/ruby_version_compatibility.rb
@@ -1,8 +1,8 @@
 require "rainbow/refinement"
 
-using Rainbow
-
 class NextRails::BundleReport::RubyVersionCompatibility
+  using Rainbow
+
   MINIMAL_VERSION = 1.0
   attr_reader :gems, :options