diff --git a/src/twilio/api/types/mod.rs b/src/twilio/api/types/mod.rs
index 062c598..598c283 100644
--- a/src/twilio/api/types/mod.rs
+++ b/src/twilio/api/types/mod.rs
@@ -6,7 +6,7 @@ pub struct TwilioAPIMessage {
     pub body: String,
     // pub date_created: time::OffsetDateTime,
     pub date_sent: Option<time::OffsetDateTime>,
-    pub date_updated: time::OffsetDateTime,
+    pub date_updated: Option<time::OffsetDateTime>,
     pub direction: String,
     // Not definite of what type this is
     pub error_code: Option<String>,