diff --git a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
index bfd7c47..0f7b77a 100644
--- a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
+++ b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
@@ -22,6 +22,7 @@ import com.fr.io.repository.FineFileEntry;
 import com.fr.io.repository.base.BaseResourceRepository;
 import com.fr.stable.Filter;
 import com.fr.stable.StringUtils;
+import com.fr.third.org.apache.commons.io.output.NullOutputStream;
 import com.fr.workspace.resource.ResourceIOException;
 
 import java.io.ByteArrayInputStream;