diff --git a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/dao/IndexNodeDao.java b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/dao/IndexNodeDao.java
index 68d3da0a..f5bc011e 100644
--- a/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/dao/IndexNodeDao.java
+++ b/doc/doc-server/src/main/java/cn/axzo/nanopart/doc/dao/IndexNodeDao.java
@@ -114,6 +114,7 @@ public class IndexNodeDao extends ServiceImpl<IndexNodeMapper, IndexNode> {
 				.eq(IndexNode::getNodeType, IndexNodeType.FILE) //
 				.list().stream() //
 				.map(node -> node.getOrCreateFileAttributes().getOssFileKey()) //
+				.filter(StringUtils::isNotBlank) //
 				.collect(Collectors.toList());
 	}