diff --git a/config/datanode.example.toml b/config/datanode.example.toml
index 7793e148ac..666430d481 100644
--- a/config/datanode.example.toml
+++ b/config/datanode.example.toml
@@ -92,7 +92,7 @@ worker_request_batch_size = 64
 # Number of meta action updated to trigger a new checkpoint for the manifest
 manifest_checkpoint_distance = 10
 # Manifest compression type
-manifest_compress_type = "Uncompressed"
+manifest_compress_type = "uncompressed"
 # Max number of running background jobs
 max_background_jobs = 4
 # Interval to auto flush a region if it has not flushed yet.
diff --git a/src/common/datasource/src/compression.rs b/src/common/datasource/src/compression.rs
index 21c566172c..77b40f8e9c 100644
--- a/src/common/datasource/src/compression.rs
+++ b/src/common/datasource/src/compression.rs
@@ -26,7 +26,9 @@ use tokio::io::{AsyncRead, AsyncWriteExt, BufReader};
 use tokio_util::io::{ReaderStream, StreamReader};
 
 use crate::error::{self, Error, Result};
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, EnumIter, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
 pub enum CompressionType {
     /// Gzip-ed file
     Gzip,
diff --git a/tests-integration/tests/http.rs b/tests-integration/tests/http.rs
index 574334de00..f6c5fb7e73 100644
--- a/tests-integration/tests/http.rs
+++ b/tests-integration/tests/http.rs
@@ -736,7 +736,7 @@ num_workers = {}
 worker_channel_size = 128
 worker_request_batch_size = 64
 manifest_checkpoint_distance = 10
-manifest_compress_type = "Uncompressed"
+manifest_compress_type = "uncompressed"
 max_background_jobs = 4
 auto_flush_interval = "30m"
 global_write_buffer_size = "1GiB"