diff --git a/config/metasrv.example.toml b/config/metasrv.example.toml
index 7ff5e4db55b7..abb2e42ec081 100644
--- a/config/metasrv.example.toml
+++ b/config/metasrv.example.toml
@@ -45,9 +45,9 @@ first_heartbeat_estimate = "1000ms"
 
 [wal]
 # Available wal providers:
-# - "raft-engine" (default)
+# - "raft_engine" (default)
 # - "kafka"
-provider = "raft-engine"
+provider = "raft_engine"
 
 # There're none raft-engine wal config since meta srv only involves in remote wal currently.
 
@@ -58,8 +58,8 @@ broker_endpoints = ["127.0.0.1:9090"]
 num_topics = 64
 # Topic selector type.
 # Available selector types: 
-# - "round-robin" (default)
-selector_type = "round-robin"
+# - "round_robin" (default)
+selector_type = "round_robin"
 # A Kafka topic is constructed by concatenating `topic_name_prefix` and `topic_id`.
 topic_name_prefix = "greptimedb_kafka_wal"
 # Number of partitions per topic.
diff --git a/src/common/meta/src/wal.rs b/src/common/meta/src/wal.rs
index eff889f2e45a..a881d7c77889 100644
--- a/src/common/meta/src/wal.rs
+++ b/src/common/meta/src/wal.rs
@@ -34,7 +34,7 @@ pub const WAL_OPTIONS_KEY: &str = "wal_options";
 #[serde(tag = "provider")]
 pub enum WalConfig {
     #[default]
-    #[serde(rename = "raft-engine")]
+    #[serde(rename = "raft_engine")]
     RaftEngine,
     #[serde(rename = "kafka")]
     Kafka(KafkaConfig),
@@ -48,7 +48,7 @@ pub enum WalConfig {
 #[serde(tag = "wal.provider")]
 pub enum WalOptions {
     #[default]
-    #[serde(rename = "raft-engine")]
+    #[serde(rename = "raft_engine")]
     RaftEngine,
     #[serde(rename = "kafka")]
     #[serde(with = "prefix_wal_kafka")]
@@ -66,14 +66,14 @@ mod tests {
     fn test_serde_wal_config() {
         // Test serde raft-engine wal config with none other wal config.
         let toml_str = r#"
-            provider = "raft-engine"
+            provider = "raft_engine"
         "#;
         let wal_config: WalConfig = toml::from_str(toml_str).unwrap();
         assert_eq!(wal_config, WalConfig::RaftEngine);
 
         // Test serde raft-engine wal config with extra other wal config.
         let toml_str = r#"
-            provider = "raft-engine"
+            provider = "raft_engine"
             broker_endpoints = ["127.0.0.1:9090"]
             num_topics = 32
         "#;
@@ -85,7 +85,7 @@ mod tests {
             provider = "kafka"
             broker_endpoints = ["127.0.0.1:9090"]
             num_topics = 32
-            selector_type = "round-robin"
+            selector_type = "round_robin"
             topic_name_prefix = "greptimedb_kafka_wal"
             num_partitions = 1
             replication_factor = 3
@@ -107,7 +107,7 @@ mod tests {
         // Test serde raft-engine wal options.
         let wal_options = WalOptions::RaftEngine;
         let encoded = serde_json::to_string(&wal_options).unwrap();
-        let expected = r#"{"wal.provider":"raft-engine"}"#;
+        let expected = r#"{"wal.provider":"raft_engine"}"#;
         assert_eq!(&encoded, expected);
 
         let decoded: WalOptions = serde_json::from_str(&encoded).unwrap();
diff --git a/src/common/meta/src/wal/kafka/topic_selector.rs b/src/common/meta/src/wal/kafka/topic_selector.rs
index 245011151e6e..f29ac55b6ba8 100644
--- a/src/common/meta/src/wal/kafka/topic_selector.rs
+++ b/src/common/meta/src/wal/kafka/topic_selector.rs
@@ -22,7 +22,7 @@ use crate::wal::kafka::topic::Topic;
 #[derive(Default, Debug, Clone, Serialize, Deserialize, PartialEq)]
 pub enum SelectorType {
     #[default]
-    #[serde(rename = "round-robin")]
+    #[serde(rename = "round_robin")]
     RoundRobin,
 }