diff --git a/file/package.json b/file/package.json
index ab31018..e662129 100644
--- a/file/package.json
+++ b/file/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cool-midway/file",
-  "version": "7.0.0",
+  "version": "7.0.2",
   "description": "",
   "main": "dist/index.js",
   "typings": "index.d.ts",
diff --git a/file/src/file.ts b/file/src/file.ts
index 1ddc486..b855011 100644
--- a/file/src/file.ts
+++ b/file/src/file.ts
@@ -333,7 +333,7 @@ export class CoolFile {
     if (!conditions) {
       conditions = [{ acl: 'public-read' }, { bucket }];
     }
-    if (!fields) {
+    if (_.isEmpty(fields)) {
       fields = {
         acl: 'public-read',
       };
diff --git a/file/src/package.json b/file/src/package.json
index a85aef7..38e1794 100644
--- a/file/src/package.json
+++ b/file/src/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cool-midway/file",
-  "version": "7.0.0",
+  "version": "7.0.2",
   "description": "",
   "main": "index.js",
   "typings": "index.d.ts",