diff --git a/api/requirements.txt b/api/requirements.txt
index 4e04ce5921..95a1d1aa9d 100644
--- a/api/requirements.txt
+++ b/api/requirements.txt
@@ -30,4 +30,5 @@ jieba==0.42.1
 celery==5.2.7
 redis~=4.5.4
 pypdf==3.8.1
-openpyxl==3.1.2
\ No newline at end of file
+openpyxl==3.1.2
+chardet~=5.1.0
\ No newline at end of file