diff --git a/lib/mdless/console.rb b/lib/mdless/console.rb
index 8e51e8f..488f878 100644
--- a/lib/mdless/console.rb
+++ b/lib/mdless/console.rb
@@ -753,7 +753,7 @@ def color_meta(text)
             m = Regexp.last_match
             MDLess.log.info('Processing YAML header')
             begin
-              MDLess.meta = YAML.load(m['content']).map { |k, v| "#{k.downcase}" => v }
+              MDLess.meta = YAML.load(m['content']).each_with_object({}) { |(k, v), h| h[k.downcase] = v }
             rescue Psych::DisallowedClass => e
               @log.error('Error reading YAML header')
               @log.error(e)