diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1fd11f5..abd414d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.5.2
+
+### Fixed
+
+- **图片下载错误提示细化**：`createClient` 下载图片失败时，401 与 403 分别给出不同提示——401 指向接口权限问题，403 指向文档“谁可以创建副本、打印和下载”的权限配置，便于快速定位排错
+
 ## 0.5.1
 
 ### Changed
diff --git a/package.json b/package.json
index 198f8a0..af0e4db 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lark-docx2md",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "description": "Convert Lark/Feishu documents to Markdown",
   "type": "module",
   "main": "./dist/converter.js",
diff --git a/src/client.ts b/src/client.ts
index d460dfa..4c05563 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -112,8 +112,11 @@ export function createClient (appId: string, appSecret: string, loggerLevel: Log
       await resp.writeFile(filename);
       return filename;
     } catch (error: any) {
-      if ([400, 401, 403].includes(error.status)) {
-        throw new Error(`下载图片[${imgToken}]异常, 检查是否有接口 https://open.feishu.cn/document/server-docs/docs/drive-v1/media/download 的权限。`);
+      if (error.status === 401) {
+        throw new Error(`下载图片[${imgToken}]异常, 检查是否有接口 https://open.feishu.cn/document/server-docs/docs/drive-v1/media/download 的权限`);
+      }
+      if (error.status === 403) {
+        throw new Error(`下载图片[${imgToken}]异常, 应用的文档权限大于等于文档本身“谁可以创建副本、打印和下载”的权限`);
       }
       throw error;
     }