diff --git a/Library/.rubocop.yml b/Library/.rubocop.yml
index 86cff402b5..343362d62e 100644
--- a/Library/.rubocop.yml
+++ b/Library/.rubocop.yml
@@ -3,6 +3,12 @@ AllCops:
     - 'Homebrew/vendor/**/*'
     - 'Homebrew/test/vendor/**/*'
 
+# Whilst we now can handle the newer hash syntax of 1.9+ the
+# hash rockets are everywhere & it'd be good to change this more
+# consistently than piecemeal.
+Style/HashSyntax:
+  EnforcedStyle: hash_rockets
+
 # ruby style guide favorite
 Style/StringLiterals:
   EnforcedStyle: double_quotes