diff --git a/src/infra/heartbeat-runner.ts b/src/infra/heartbeat-runner.ts
index d228e228b..c94aae797 100644
--- a/src/infra/heartbeat-runner.ts
+++ b/src/infra/heartbeat-runner.ts
@@ -357,7 +357,7 @@ function normalizeHeartbeatReply(
   ackMaxChars: number,
 ) {
   const rawText = typeof payload.text === "string" ? payload.text : "";
-    
+
   const prefixPattern = responsePrefix?.trim()
     ? new RegExp(`^${escapeRegExp(responsePrefix.trim())}\\s*`, "i")
     : null;