diff --git a/crates/fidc-core/src/data.rs b/crates/fidc-core/src/data.rs
index 1f0f9ce..f9661d5 100644
--- a/crates/fidc-core/src/data.rs
+++ b/crates/fidc-core/src/data.rs
@@ -208,7 +208,7 @@ pub struct CandidateEligibility {
     pub allow_sell: bool,
     pub is_kcb: bool,
     pub is_one_yuan: bool,
-    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[serde(default)]
     pub risk_level_code: Option<String>,
 }