diff --git a/README.md b/README.md
index d912ac4..e8dc130 100644
--- a/README.md
+++ b/README.md
@@ -205,7 +205,7 @@ it](https://github.com/stevearc/aerial.nvim/issues/new?assignees=stevearc&labels
 require("aerial").setup({
   -- Priority list of preferred backends for aerial.
   -- This can be a filetype map (see :help aerial-filetype-map)
-  backends = { "treesitter", "lsp", "markdown", "man" },
+  backends = { "treesitter", "lsp", "markdown", "asciidoc", "man" },
 
   layout = {
     -- These control the width of the aerial window.
@@ -546,6 +546,11 @@ require("aerial").setup({
     update_delay = 300,
   },
 
+  asciidoc = {
+    -- How long to wait (in ms) after a buffer change before updating
+    update_delay = 300,
+  },
+
   man = {
     -- How long to wait (in ms) after a buffer change before updating
     update_delay = 300,
diff --git a/doc/aerial.txt b/doc/aerial.txt
index f6648e5..90d1677 100644
--- a/doc/aerial.txt
+++ b/doc/aerial.txt
@@ -15,7 +15,7 @@ OPTIONS                                                           *aerial-option
     require("aerial").setup({
       -- Priority list of preferred backends for aerial.
       -- This can be a filetype map (see :help aerial-filetype-map)
-      backends = { "treesitter", "lsp", "markdown", "man" },
+      backends = { "treesitter", "lsp", "markdown", "asciidoc", "man" },
 
       layout = {
         -- These control the width of the aerial window.
@@ -356,6 +356,11 @@ OPTIONS                                                           *aerial-option
         update_delay = 300,
       },
 
+      asciidoc = {
+        -- How long to wait (in ms) after a buffer change before updating
+        update_delay = 300,
+      },
+
       man = {
         -- How long to wait (in ms) after a buffer change before updating
         update_delay = 300,