diff --git a/_plugins/bidirectional_links_generator.rb b/_plugins/bidirectional_links_generator.rb
index 057635a..46956cf 100644
--- a/_plugins/bidirectional_links_generator.rb
+++ b/_plugins/bidirectional_links_generator.rb
@@ -66,6 +66,6 @@ class BidirectionalLinksGenerator < Jekyll::Generator
   end
 
   def note_id_from_note(note)
-    note.data['title'].to_i(36).to_s
+    note.data['title'].gsub!(/\W+/, '').to_i(36).to_s
   end
 end