diff --git a/_source/_plugins/overline.rb b/_source/_plugins/overline.rb
index 57d3576..99e3f59 100644
--- a/_source/_plugins/overline.rb
+++ b/_source/_plugins/overline.rb
@@ -1,7 +1,7 @@
 module Jekyll
   class OverlineFilter
     def self.apply_overline(content)
-      content.gsub(/~([^~]+)~/, '<span class="overline">\1</span>')
+      content.gsub(/~([^~\s]+)~/, '<span class="overline">\1</span>')
     end
   end