diff --git a/Library/.rubocop.yml b/Library/.rubocop.yml
index c532bede05..74a4889172 100644
--- a/Library/.rubocop.yml
+++ b/Library/.rubocop.yml
@@ -66,6 +66,10 @@ Style/EmptyLineBetweenDefs:
 Style/NumericLiterals:
   Enabled: false
 
+# zero-prefixed octal literals are just too widely used (and mostly understood)
+Style/NumericLiteralPrefix:
+  EnforcedOctalStyle: zero_only
+
 # consistency and readability when faced with string interpolation
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
diff --git a/Library/Homebrew/cmd/style.rb b/Library/Homebrew/cmd/style.rb
index 2356a031b3..0e756ad0c3 100644
--- a/Library/Homebrew/cmd/style.rb
+++ b/Library/Homebrew/cmd/style.rb
@@ -47,7 +47,7 @@ module Homebrew
 
   def check_style_impl(files, output_type, options = {})
     fix = options[:fix]
-    Homebrew.install_gem_setup_path! "rubocop", "0.40"
+    Homebrew.install_gem_setup_path! "rubocop", "0.41.1"
 
     args = %W[
       --force-exclusion