diff --git a/lua/blink-cmp-ghostty.lua b/lua/blink-cmp-ghostty.lua
index 2efd951..abfcd98 100644
--- a/lua/blink-cmp-ghostty.lua
+++ b/lua/blink-cmp-ghostty.lua
@@ -5,6 +5,9 @@ local M = {}
 local keys_cache = nil
 ---@type table<string, string[]>?
 local enums_cache = nil
+local loading = false
+---@type {ctx: blink.cmp.Context, callback: fun(response: blink.cmp.CompletionResponse)}[]
+local pending = {}
 
 function M.new()
   return setmetatable({}, { __index = M })
@@ -15,14 +18,14 @@ function M.enabled()
   return vim.bo.filetype == 'ghostty'
 end
 
+---@param stdout string
 ---@return blink.cmp.CompletionItem[]
-local function parse_keys()
+local function parse_keys(stdout)
   local Kind = require('blink.cmp.types').CompletionItemKind
-  local result = vim.system({ 'ghostty', '+show-config', '--docs' }):wait()
   local items = {}
   local doc_lines = {}
 
-  for line in ((result.stdout or '') .. '\n'):gmatch('(.-)\n') do
+  for line in (stdout .. '\n'):gmatch('(.-)\n') do
     if line:match('^#') then
       local stripped = line:gsub('^# ?', '')
       doc_lines[#doc_lines + 1] = stripped
@@ -79,13 +82,7 @@ end
 
 ---@param ctx blink.cmp.Context
 ---@param callback fun(response: blink.cmp.CompletionResponse)
----@return fun()
-function M:get_completions(ctx, callback)
-  if not keys_cache then
-    keys_cache = parse_keys()
-    enums_cache = parse_enums()
-  end
-
+local function respond(ctx, callback)
   local line = ctx.line
   local col = ctx.cursor[2]
   local eq_pos = line:find('=')
@@ -108,16 +105,42 @@ function M:get_completions(ctx, callback)
         is_incomplete_backward = false,
         items = items,
       })
-      return function() end
+      return
     end
     callback({ items = {} })
   else
     callback({
       is_incomplete_forward = false,
       is_incomplete_backward = false,
-      items = vim.deepcopy(keys_cache),
+      items = keys_cache,
     })
   end
+end
+
+---@param ctx blink.cmp.Context
+---@param callback fun(response: blink.cmp.CompletionResponse)
+---@return fun()
+function M:get_completions(ctx, callback)
+  if keys_cache then
+    respond(ctx, callback)
+    return function() end
+  end
+
+  pending[#pending + 1] = { ctx = ctx, callback = callback }
+  if not loading then
+    loading = true
+    vim.system({ 'ghostty', '+show-config', '--docs' }, {}, function(result)
+      vim.schedule(function()
+        keys_cache = parse_keys(result.stdout or '')
+        enums_cache = parse_enums()
+        loading = false
+        for _, p in ipairs(pending) do
+          respond(p.ctx, p.callback)
+        end
+        pending = {}
+      end)
+    end)
+  end
   return function() end
 end
 
diff --git a/spec/ghostty_spec.lua b/spec/ghostty_spec.lua
index 5c7e804..fae7bab 100644
--- a/spec/ghostty_spec.lua
+++ b/spec/ghostty_spec.lua
@@ -19,24 +19,31 @@ local BASH_COMPLETION = table.concat({
 }, '\n')
 
 local function mock_system()
-  local original = vim.system
+  local original_system = vim.system
+  local original_schedule = vim.schedule
   ---@diagnostic disable-next-line: duplicate-set-field
-  vim.system = function(cmd)
+  vim.system = function(cmd, _, on_exit)
     if cmd[1] == 'ghostty' then
-      return {
-        wait = function()
-          return { stdout = CONFIG_DOCS, code = 0 }
-        end,
-      }
+      local result = { stdout = CONFIG_DOCS, code = 0 }
+      if on_exit then
+        on_exit(result)
+        return {}
+      end
+      return { wait = function() return result end }
     end
-    return {
-      wait = function()
-        return { stdout = '', code = 1 }
-      end,
-    }
+    local result = { stdout = '', code = 1 }
+    if on_exit then
+      on_exit(result)
+      return {}
+    end
+    return { wait = function() return result end }
+  end
+  vim.schedule = function(fn)
+    fn()
   end
   return function()
-    vim.system = original
+    vim.system = original_system
+    vim.schedule = original_schedule
   end
 end