diff --git a/bundler/lib/dependabot/bundler/helpers.rb b/bundler/lib/dependabot/bundler/helpers.rb
index 7bc15d4f880..494fbbfe7c6 100644
--- a/bundler/lib/dependabot/bundler/helpers.rb
+++ b/bundler/lib/dependabot/bundler/helpers.rb
@@ -40,7 +40,7 @@ def self.detected_bundler_version(lockfile)
         params(
           gemfile: T.nilable(Dependabot::DependencyFile),
           lockfile: T.nilable(Dependabot::DependencyFile)
-        ).returns(Gem::Version)
+        ).returns(String)
       end
       def self.ruby_version(gemfile, lockfile)
         ruby_version = ruby_version_from_ruby_version_file
@@ -49,9 +49,10 @@ def self.ruby_version(gemfile, lockfile)
 
         ruby_version = ruby_version_from_definition(gemfile, lockfile) if ruby_version.nil?
 
+        # If we still don't have a Ruby version, the version dependabot is running on is used
         ruby_version = RUBY_VERSION if ruby_version.nil?
 
-        Gem::Version.new(ruby_version)
+        ruby_version
       end
 
       sig do