diff --git a/src/main/java/com/zcloud/util/Warden.java b/src/main/java/com/zcloud/util/Warden.java
index 3efb31ee..5ad9d29b 100644
--- a/src/main/java/com/zcloud/util/Warden.java
+++ b/src/main/java/com/zcloud/util/Warden.java
@@ -9,6 +9,7 @@ import org.apache.commons.fileupload.FileItem;
 import org.apache.commons.fileupload.FileItemFactory;
 import org.apache.commons.fileupload.disk.DiskFileItemFactory;
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.client.methods.HttpPost;