diff --git a/ibandit.gemspec b/ibandit.gemspec
index 393baf4..09b2e94 100644
--- a/ibandit.gemspec
+++ b/ibandit.gemspec
@@ -3,7 +3,7 @@
 require File.expand_path("lib/ibandit/version", __dir__)
 
 Gem::Specification.new do |gem|
-  gem.add_development_dependency "gc_ruboconfig",   "~> 2.26.0"
+  gem.add_development_dependency "gc_ruboconfig",   "~> 2.29.0"
   gem.add_development_dependency "nokogiri",        "~> 1.6"
   gem.add_development_dependency "pry",             "~> 0.13"
   gem.add_development_dependency "pry-byebug",      "~> 3.9"