diff --git a/backend/requirements.txt b/backend/requirements.txt
index 4f146296..b787a531 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -33,3 +33,4 @@ python-dotenv>=1.0.0
 
 # 数据验证
 pydantic>=2.0.0
+unstructured==0.18.18