diff --git a/data/computercraft/lua/rom/programs/appdelete.lua b/data/computercraft/lua/rom/programs/appdelete.lua
index c22643d..96ec323 100644
--- a/data/computercraft/lua/rom/programs/appdelete.lua
+++ b/data/computercraft/lua/rom/programs/appdelete.lua
@@ -3,7 +3,6 @@
 local fs = require("fs")
 local tu = require("textutils")
 local shell = require("shell")
-local read = require("read")
 
 local function show_help()
   print("Usage: appdelete <application_name> [options]")
@@ -41,7 +40,7 @@ local function delete_app(app_name, force)
   -- 确认删除
   if not force then
     print("Are you sure you want to delete '" .. app_name .. "'? (y/n)")
-    local confirm = read()
+    local confirm = io.read()
     if confirm ~= "y" and confirm ~= "yes" then
       print("Deletion cancelled.")
       return false
diff --git a/installer.lua b/installer.lua
index fccfb21..a09ed23 100644
--- a/installer.lua
+++ b/installer.lua
@@ -1,5 +1,5 @@
 -- LeonOS installer
-local INSTALLER_VERSION = "0.3.7 Beta 3"
+local INSTALLER_VERSION = "0.3.7 Beta 4"
 local DEFAULT_ROM_DIR = "/leonos"
 
 print("Start loading LeonOS installer ("..INSTALLER_VERSION..")...")