diff --git a/ui/src/i18n/en.json b/ui/src/i18n/en.json
index 3ba5d01..aedd5a2 100644
--- a/ui/src/i18n/en.json
+++ b/ui/src/i18n/en.json
@@ -46,6 +46,7 @@
   "Stderr": "Stderr",
   "Select file": "Select file",
   "Upload": "Upload",
+  "Device offline": "Device offline",
   "Sessions is full": "Sessions is full",
   "Copy - Ctrl+Insert": "Copy - Ctrl+Insert",
   "Paste - Shift+Insert": "Paste - Shift+Insert",
diff --git a/ui/src/i18n/zh-CN.json b/ui/src/i18n/zh-CN.json
index ecf379d..f3c67bd 100644
--- a/ui/src/i18n/zh-CN.json
+++ b/ui/src/i18n/zh-CN.json
@@ -48,6 +48,7 @@
   "Upload file to device": "上传文件到设备",
   "Select file": "选择文件",
   "Upload": "上传",
+  "Device offline": "设备离线",
   "Sessions is full": "会话已满",
   "Copy - Ctrl+Insert": "复制 - Ctrl+Insert",
   "Paste - Shift+Insert": "粘贴 - Shift+Insert",