diff --git a/src/main/java/org/jitsi/jigasi/transcription/LocalJsonTranscriptHandler.java b/src/main/java/org/jitsi/jigasi/transcription/LocalJsonTranscriptHandler.java
index 861cc3327..9fe5eb1eb 100644
--- a/src/main/java/org/jitsi/jigasi/transcription/LocalJsonTranscriptHandler.java
+++ b/src/main/java/org/jitsi/jigasi/transcription/LocalJsonTranscriptHandler.java
@@ -335,7 +335,7 @@ public static void addEventDescriptions(
         JSONObject jsonObject, TranscriptEvent e)
     {
         jsonObject.put(JSON_KEY_EVENT_EVENT_TYPE, e.getEvent().toString());
-        jsonObject.put(JSON_KEY_EVENT_TIMESTAMP, String.valueOf(e.getTimeStamp().toEpochMilli()));
+        jsonObject.put(JSON_KEY_EVENT_TIMESTAMP, e.getTimeStamp().toEpochMilli());
 
         JSONObject participantJson = new JSONObject();
 
diff --git a/src/main/java/org/jitsi/jigasi/transcription/RemotePublisherTranscriptionHandler.java b/src/main/java/org/jitsi/jigasi/transcription/RemotePublisherTranscriptionHandler.java
index 337ad4405..97d35e2df 100644
--- a/src/main/java/org/jitsi/jigasi/transcription/RemotePublisherTranscriptionHandler.java
+++ b/src/main/java/org/jitsi/jigasi/transcription/RemotePublisherTranscriptionHandler.java
@@ -99,7 +99,7 @@ else if (event.getEvent() == Transcript.TranscriptEventType.START
             object.put(JSON_KEY_EVENT_EVENT_TYPE,
                 event.getEvent().toString());
             object.put(JSON_KEY_EVENT_TIMESTAMP,
-                String.valueOf(event.getTimeStamp().toEpochMilli()));
+                event.getTimeStamp().toEpochMilli());
         }
 
         for (String url : urls)
diff --git a/src/main/java/org/jitsi/jigasi/transcription/action/ActionServicesHandler.java b/src/main/java/org/jitsi/jigasi/transcription/action/ActionServicesHandler.java
index 32320bd1e..3807ec83d 100644
--- a/src/main/java/org/jitsi/jigasi/transcription/action/ActionServicesHandler.java
+++ b/src/main/java/org/jitsi/jigasi/transcription/action/ActionServicesHandler.java
@@ -250,7 +250,7 @@ public void notifyActionServices(
         object.put(LocalJsonTranscriptHandler.JSON_KEY_EVENT_EVENT_TYPE,
             event.getEvent().toString());
         object.put(LocalJsonTranscriptHandler.JSON_KEY_EVENT_TIMESTAMP,
-            String.valueOf(event.getTimeStamp().toEpochMilli()));
+            event.getTimeStamp().toEpochMilli());
 
         for (ActionHandler handler : actionSources.remove(roomName))
         {