diff --git a/doc/outline.txt b/doc/outline.txt
index 18c416a..366c319 100644
--- a/doc/outline.txt
+++ b/doc/outline.txt
@@ -1,4 +1,4 @@
-*outline.txt*           For NVIM v0.7.0           Last change: 2024 January 22
+*outline.txt*            For NVIM v0.7.0            Last change: 2024 March 16
 
 ==============================================================================
 Table of Contents                                  *outline-table-of-contents*
@@ -311,10 +311,15 @@ Show defaults ~
     
       providers = {
         priority = { 'lsp', 'coc', 'markdown', 'norg' },
+        -- Configuration for each provider (3rd party providers are supported)
         lsp = {
           -- Lsp client names to ignore
           blacklist_clients = {},
         },
+        markdown = {
+          -- List of supported ft's to use the markdown provider
+          filetypes = {'markdown'},
+        },
       },
     
       symbols = {
@@ -447,8 +452,11 @@ for use as a provider.
 External providers from plugins should define the provider module at
 `lua/outline/providers/<name>.lua` with these functions:
 
-- `supports_buffer(bufnr: integer) -> boolean`
+- `supports_buffer(bufnr: integer, config: table?) -> boolean`
     This function could check buffer filetype, existence of required modules, etc.
+    The config table comes from the user’s configuration in the
+    `providers['provider-name']` table where `provider-name` is the
+    `require('outline.providers.<name>').name`.
 - `get_status() -> string[]` (optional)
     Return a list of lines to be included in `:OutlineStatus` as supplementary
     information when this provider is active.