diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 0021c96..fe50fe9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2024-02-01 15:28:54 UTC using RuboCop version 1.48.1.
+# on 2024-05-12 16:41:11 UTC using RuboCop version 1.63.5.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -20,6 +20,7 @@ Lint/EmptyBlock:
     - 'test/hyperclient/entry_point_test.rb'
 
 # Offense count: 4
+# Configuration parameters: AllowedParentClasses.
 Lint/MissingSuper:
   Exclude:
     - 'lib/hyperclient/attributes.rb'
diff --git a/Gemfile b/Gemfile
index 9e491cc..fd433a2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ end
 
 group :development, :test do
   gem 'rake'
-  gem 'rubocop', '~> 1.48.0', require: false
+  gem 'rubocop', '~> 1.63.5', require: false
   gem 'rubocop-minitest', require: false
   gem 'rubocop-rake', require: false
   gem 'simplecov', require: false
diff --git a/examples/splines_api.rb b/examples/splines_api.rb
index 34d3b43..61d959d 100644
--- a/examples/splines_api.rb
+++ b/examples/splines_api.rb
@@ -7,7 +7,7 @@
 
 # enumerate splines
 api.splines.each do |spline|
-  puts spline.uuid.to_s
+  puts spline.uuid
   puts " reticulated: #{spline.reticulated ? 'yes' : 'no'}"
   puts " thumbnail: #{spline['images:thumbnail']}"
 end