diff --git a/README.md b/README.md
index bac488d5..b844fed1 100644
--- a/README.md
+++ b/README.md
@@ -295,7 +295,7 @@ adding this to your `.yardopts` file:
 
 Be sure to add this to your `Gemfile` as well:
 
-    gem 'kramdown', groups => [:development], require => false
+    gem 'kramdown', :groups => [:development], :require => false
 
 ## WARNING