diff --git a/flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/JsonFileSystemFormatFactory.java b/flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/JsonFileSystemFormatFactory.java
index 1ecdc735dbc42..831b8ca5d8724 100644
--- a/flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/JsonFileSystemFormatFactory.java
+++ b/flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/JsonFileSystemFormatFactory.java
@@ -135,6 +135,9 @@ public Optional<BulkWriter.Factory<RowData>> createBulkWriterFactory(WriterConte
 	 * from json format files.
 	 */
 	public static class JsonInputFormat extends DelimitedInputFormat<RowData> {
+
+		private static final long serialVersionUID = 1L;
+
 		/**
 		 * Code of \r, used to remove \r from a line when the line ends with \r\n.
 		 */