diff --git a/src/connector/src/source/nexmark/mod.rs b/src/connector/src/source/nexmark/mod.rs
index 474eeaf6f0619..0c63a96dfe683 100644
--- a/src/connector/src/source/nexmark/mod.rs
+++ b/src/connector/src/source/nexmark/mod.rs
@@ -43,11 +43,9 @@ const fn none<T>() -> Option<T> {
     None
 }
 
-pub type NexmarkProperties = Box<NexmarkPropertiesInner>;
-
 #[serde_as]
 #[derive(Clone, Debug, Deserialize, WithOptions)]
-pub struct NexmarkPropertiesInner {
+pub struct NexmarkProperties {
     #[serde_as(as = "DisplayFromStr")]
     #[serde(rename = "nexmark.split.num", default = "identity_i32::<1>")]
     pub split_num: i32,
@@ -233,15 +231,15 @@ fn default_event_num() -> u64 {
     u64::MAX
 }
 
-impl Default for NexmarkPropertiesInner {
+impl Default for NexmarkProperties {
     fn default() -> Self {
         let v = serde_json::to_value(HashMap::<String, String>::new()).unwrap();
-        NexmarkPropertiesInner::deserialize(v).unwrap()
+        NexmarkProperties::deserialize(v).unwrap()
     }
 }
 
-impl From<&NexmarkPropertiesInner> for NexmarkConfig {
-    fn from(value: &NexmarkPropertiesInner) -> Self {
+impl From<&NexmarkProperties> for NexmarkConfig {
+    fn from(value: &NexmarkProperties) -> Self {
         // 2015-07-15 00:00:00
         pub const BASE_TIME: u64 = 1_436_918_400_000;
 
diff --git a/src/connector/src/source/nexmark/source/reader.rs b/src/connector/src/source/nexmark/source/reader.rs
index 28dc76eadeb48..c8e7b0c41d7ea 100644
--- a/src/connector/src/source/nexmark/source/reader.rs
+++ b/src/connector/src/source/nexmark/source/reader.rs
@@ -77,7 +77,7 @@ impl SplitReader for NexmarkSplitReader {
         let offset = split.start_offset.unwrap_or(split_index);
         let assigned_split = split;
 
-        let mut generator = EventGenerator::new(NexmarkConfig::from(&*properties))
+        let mut generator = EventGenerator::new(NexmarkConfig::from(&properties))
             .with_offset(offset)
             .with_step(split_num);
         // If the user doesn't specify the event type in the source definition, then the user
@@ -188,18 +188,18 @@ mod tests {
     use anyhow::Result;
 
     use super::*;
-    use crate::source::nexmark::{NexmarkPropertiesInner, NexmarkSplitEnumerator};
+    use crate::source::nexmark::{NexmarkProperties, NexmarkSplitEnumerator};
     use crate::source::{SourceEnumeratorContext, SplitEnumerator};
 
     #[tokio::test]
     async fn test_nexmark_split_reader() -> Result<()> {
-        let props = Box::new(NexmarkPropertiesInner {
+        let props = NexmarkProperties {
             split_num: 2,
             min_event_gap_in_ns: 0,
             table_type: Some(EventType::Bid),
             max_chunk_size: 5,
             ..Default::default()
-        });
+        };
 
         let mut enumerator =
             NexmarkSplitEnumerator::new(props.clone(), SourceEnumeratorContext::default().into())