diff --git a/README.md b/README.md
index 37b573e4..fe5c9ed9 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,8 @@ PREFIX = "tmp" # 要处理的邮箱名称前缀
 DOMAINS = ["xxx.xxx1" , "xxx.xxx2"] # 你的域名
 JWT_SECRET = "xxx" # 用于生成 jwt 的密钥
 BLACK_LIST = "" # 黑名单，用于过滤发件人，逗号分隔
+# 免费版附件过大会造成 Exceeded CPU Limit 错误，如果不需要附件功能，可以关闭
+ENABLE_ATTACHMENT = true
 
 [[d1_databases]]
 binding = "DB"
diff --git a/README_EN.md b/README_EN.md
index d52158bc..99f9d63e 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -56,6 +56,8 @@ pnpm install
 # DOMAINS = ["xxx.xxx1" , "xxx.xxx2"] you domain name
 # JWT_SECRET = "xxx"
 # BLACK_LIST = ""
+# free version attachment too large will cause Exceeded CPU Limit error, if you don't need attachment function, you can close
+# ENABLE_ATTACHMENT = true
 cp wrangler.toml.template wrangler.toml
 # deploy
 pnpm run deploy
diff --git a/worker/src/email.js b/worker/src/email.js
index 849665bb..b71f9fda 100644
--- a/worker/src/email.js
+++ b/worker/src/email.js
@@ -82,7 +82,8 @@ async function email(message, env, ctx) {
         // process attachments
         try {
             if (
-                parsedEmail.attachments
+                env.ENABLE_ATTACHMENT
+                && parsedEmail.attachments
                 && parsedEmail.attachments.length > 0
             ) {
                 const { success } = await env.DB.prepare(
diff --git a/worker/wrangler.toml.template b/worker/wrangler.toml.template
index beb7955f..6a1f8893 100644
--- a/worker/wrangler.toml.template
+++ b/worker/wrangler.toml.template
@@ -12,6 +12,8 @@ PREFIX = "tmp"
 DOMAINS = ["xxx.xxx1" , "xxx.xxx2"]
 JWT_SECRET = "xxx"
 BLACK_LIST = ""
+# IF YOU WANT DISABLE ATTACHMENT, SET IT TO false or COMMENT IT
+ENABLE_ATTACHMENT = true
 
 [[d1_databases]]
 binding = "DB"