diff --git a/tag_database b/tag_database
index b3ba59a8f..1e21a4c20 100644
--- a/tag_database
+++ b/tag_database
@@ -22,4 +22,5 @@ is_upper_case:string
 is_lower_case:string
 count_by:list
 difference_by:list
-insertion_sort:list
\ No newline at end of file
+insertion_sort:list
+bubble_sort: list