diff --git a/backend/services/admin-service/src/api/dto/request/upload-version.dto.ts b/backend/services/admin-service/src/api/dto/request/upload-version.dto.ts
index d2918381..620c3966 100644
--- a/backend/services/admin-service/src/api/dto/request/upload-version.dto.ts
+++ b/backend/services/admin-service/src/api/dto/request/upload-version.dto.ts
@@ -34,12 +34,21 @@ export class UploadVersionDto {
 
   @ApiPropertyOptional({ description: '是否强制更新', default: false })
   @IsOptional()
-  @Transform(({ value }) => {
+  @Transform(({ obj }) => {
+    // Access the raw value directly from the source object
+    // This bypasses enableImplicitConversion which incorrectly converts "false" string to true
+    const rawValue = obj.isForceUpdate
+
     // Handle string "true"/"false" from FormData
-    if (typeof value === 'string') {
-      return value.toLowerCase() === 'true'
+    if (typeof rawValue === 'string') {
+      return rawValue.toLowerCase() === 'true'
     }
-    return value === true
+    // Handle undefined/null - default to false
+    if (rawValue === undefined || rawValue === null) {
+      return false
+    }
+    // Handle actual boolean value
+    return rawValue === true
   })
   @IsBoolean()
   isForceUpdate?: boolean