diff --git a/rubocop.yml b/rubocop.yml
index 67c794b..f5c41a6 100644
--- a/rubocop.yml
+++ b/rubocop.yml
@@ -34,7 +34,7 @@ Style/Encoding:
   EnforcedStyle: when_needed
 
 Style/HashSyntax:
-  EnforcedStyle: hash_rockets
+  EnforcedStyle: ruby19_no_mixed_keys
 
 Style/IndentHash:
   EnforcedStyle: consistent