diff --git a/crates/hyperqueue/src/server/event/mod.rs b/crates/hyperqueue/src/server/event/mod.rs
index 97b084648..5dc5a7fc9 100644
--- a/crates/hyperqueue/src/server/event/mod.rs
+++ b/crates/hyperqueue/src/server/event/mod.rs
@@ -3,6 +3,7 @@ pub mod payload;
 pub mod streamer;
 
 use bincode::Options;
+use chrono::serde::ts_milliseconds;
 use chrono::{DateTime, Utc};
 use payload::EventPayload;
 use serde::{Deserialize, Serialize};
@@ -11,6 +12,7 @@ pub type EventId = u32;
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct Event {
+    #[serde(with = "ts_milliseconds")]
     pub time: DateTime<Utc>,
     pub payload: EventPayload,
 }