diff --git a/.codeclimate.yml b/.codeclimate.yml
index c54f8b4..917d643 100644
--- a/.codeclimate.yml
+++ b/.codeclimate.yml
@@ -13,6 +13,6 @@ plugins:
     enabled: true
   rubocop:
     enabled: true
-    channel: rubocop-1-39-0
+    channel: rubocop-1-56-3
 exclude_patterns:
   - "spec/"
diff --git a/rggen-duh.gemspec b/rggen-duh.gemspec
index 9d20703..edbe533 100644
--- a/rggen-duh.gemspec
+++ b/rggen-duh.gemspec
@@ -30,6 +30,4 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'json_refs', '>= 0.1.4'
   spec.add_runtime_dependency 'json_schemer', '>= 2.0.0'
   spec.add_runtime_dependency 'rb_json5', '>= 0.3.0'
-
-  spec.add_development_dependency 'bundler'
 end