diff --git a/gateway/heartbeat.ts b/gateway/heartbeat.ts
index e8b58d0ad..911d2d116 100644
--- a/gateway/heartbeat.ts
+++ b/gateway/heartbeat.ts
@@ -49,6 +49,7 @@ export async function heartbeat(gateway: GatewayManager, shardId: number, interv
     if (currentShard.ws.readyState !== WebSocket.OPEN) return;
 
     currentShard.heartbeat.acknowledged = false;
+    currentShard.heartbeat.lastSentAt = Date.now();
 
     currentShard.ws.send(
       JSON.stringify({