diff --git a/2025/ruby/day_05.rb b/2025/ruby/day_05.rb
index b2636ff..9f784d2 100644
--- a/2025/ruby/day_05.rb
+++ b/2025/ruby/day_05.rb
@@ -8,7 +8,7 @@ ranges = fresh
   .sort_by { [it.begin, it.end] }
   .chunk_while { _1.end >= _2.begin }
   .map {|ranges|
-    Range.new(ranges.map(&:begin).min, ranges.map(&:end).max)
+    Range.new(ranges[0].min, ranges.map(&:end).max)
   }
 
 pp ranges.sum(&:size)