diff --git a/README.md b/README.md
index fb4691bf3..82381839e 100644
--- a/README.md
+++ b/README.md
@@ -71,8 +71,8 @@ require'nvim-treesitter'.install { 'rust', 'javascript', 'zig' }
 (This is a no-op if the parsers are already installed.) Note that this function runs asynchronously; for synchronous installation in a script context ("bootstrapping"), use something like
 ```lua
 local done = nil
-require('nvim-treesitter').install({ 'rust', 'javascript', 'zig' }, function(success)
-  done = success
+require('nvim-treesitter').install({ 'rust', 'javascript', 'zig' }):await(function(_, ok)
+  done = ok
 end)
 vim.wait(3000000, function() return done ~= nil end)
 ```
diff --git a/TODO.md b/TODO.md
index 5f12ac997..937a8b63b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,7 +4,6 @@ This document lists the planned and finished changes in this rewrite towards [Nv
 
 ## TODO
 
-- [ ] **`install.lua`:** migrate to async v2
 - [ ] **tests:** remove custom crate, plenary dependency
 - [ ] **indents:** rewrite (Helix or Zed compatible)
 - [ ] **textobjects:** include simple(!) `node`, `scope` (using `locals`) objects
@@ -26,3 +25,4 @@ This document lists the planned and finished changes in this rewrite towards [Nv
 - [X] drop ensure_install (replace with install)
 - [X] **CI:** switch to ts_query_ls, add update readme as check (remove update job)
 - [X] **CI:** track versioned releases for tier 1
+- [X] **`install.lua`:** migrate to async v2
diff --git a/doc/nvim-treesitter.txt b/doc/nvim-treesitter.txt
index c810023f7..9b20da31d 100644
--- a/doc/nvim-treesitter.txt
+++ b/doc/nvim-treesitter.txt
@@ -102,7 +102,7 @@ setup({opts})                                          *nvim-treesitter.setup()*
                 directory to install parsers and queries to. Note: will be
                 appended to |runtimepath|.
 
-install({languages}, {opts}, {callback})             *nvim-treesitter.install()*
+install({languages} [, {opts}])                    *nvim-treesitter.install()*
 
     Download, compile, and install the specified treesitter parsers and copy
     the corresponding queries to a directory on |runtimepath|, enabling their
@@ -110,12 +110,10 @@ install({languages}, {opts}, {callback})             *nvim-treesitter.install()*
 
     Note: This operation is performed asynchronously by default. For
     synchronous operation (e.g., in a bootstrapping script), you need to
-    provide a suitable {callback}: >lua
+    `await()` it: >lua
         local done = nil
-        require('nvim-treesitter').install({ 'rust', 'javascript', 'zig' },
-          function(success)
-            done = success
-          end)
+        require('nvim-treesitter').install({ 'rust', 'javascript', 'zig' })
+                                  :await(function(_, ok) done = ok end)
         vim.wait(3000000, function() return done ~= nil end)
 <
     Parameters: ~
@@ -129,7 +127,6 @@ install({languages}, {opts}, {callback})             *nvim-treesitter.install()*
                      compiling.
                    • {max_jobs} (`integer?`) limit parallel tasks (useful in
                      combination with {generate} on memory-limited systems).
-    • {callback}   `(function?`) Callback for synchronous execution.
 
 uninstall({languages})                              *nvim-treesitter.uninstall()*
 
@@ -139,25 +136,21 @@ uninstall({languages})                              *nvim-treesitter.uninstall()
     • {languages}  `(string[]|string)` (List of) languages or tiers (`stable`,
                    `unstable`) to update.
 
-update({languages}, {callback})                       *nvim-treesitter.update()*
+update([{languages}])                                  *nvim-treesitter.update()*
 
     Update the parsers and queries if older than the revision specified in the
     manifest.
 
     Note: This operation is performed asynchronously by default. For
     synchronous operation (e.g., in a bootstrapping script), you need to
-    provide a suitable {callback}: >lua
+    `await()` it: >lua
         local done = nil
-        require('nvim-treesitter').update(), 
-          function(success)
-            done = success
-          end)
+        require('nvim-treesitter').update():await(function(_, ok) done = ok end)
         vim.wait(3000000, function() return done ~= nil end)
 <
     Parameters: ~
-    • {languages}  `(string[]|string)` (List of) languages or tiers to
-                   uninstall.
-    • {callback}   `(function?`) Callback for synchronous execution.
+    • {languages}  `(string[]|string)?` (List of) languages or tiers to update
+                   (default: all installed).
 
 indentexpr()                                      *nvim-treesitter.indentexpr()*
 
diff --git a/scripts/install-parsers.lua b/scripts/install-parsers.lua
index 6dbc73d68..31b662a35 100755
--- a/scripts/install-parsers.lua
+++ b/scripts/install-parsers.lua
@@ -21,24 +21,22 @@ vim.opt.runtimepath:append('.')
 -- needed on CI
 vim.fn.mkdir(vim.fn.stdpath('cache'), 'p')
 
-local ok = nil
+local done = nil
 if update then
-  require('nvim-treesitter.install').update('all', {}, function(success)
-    ok = success
+  require('nvim-treesitter.install').update('all'):await(function(_err, ok)
+    done = ok
   end)
 else
-  require('nvim-treesitter.install').install(
-    #parsers > 0 and parsers or 'all',
-    { force = true, generate = generate, max_jobs = max_jobs },
-    function(success)
-      ok = success
-    end
-  )
+  require('nvim-treesitter.install')
+    .install(#parsers > 0 and parsers or 'all', { force = true, generate = generate, max_jobs = max_jobs })
+    :await(function(_err, ok)
+      done = ok
+    end)
 end
 
 vim.wait(6000000, function()
-  return ok ~= nil
+  return done ~= nil
 end)
-if not ok then
+if not done then
   vim.cmd.cq()
 end