diff --git a/doc/outline.txt b/doc/outline.txt
index b611e0f..941ea3f 100644
--- a/doc/outline.txt
+++ b/doc/outline.txt
@@ -452,7 +452,9 @@ requirements) 1. Norg (requires `norg` parser for treesitter)
 
 External providers: - Asciidoc
 <https://github.com/msr1k/outline-asciidoc-provider.nvim> (no external
-requirements) - ctags <https://github.com/epheien/outline-ctags-provider.nvim>
+requirements) - treesitter
+<https://github.com/epheien/outline-treesitter-provider.nvim> (require
+treesitter) - ctags <https://github.com/epheien/outline-ctags-provider.nvim>
 (require universal-ctags)
 
 How to implement an external provider ~