diff --git a/lib/index.js b/lib/index.js
index 6398440..1de670f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -76,6 +76,7 @@ function logglyAppender(config, layout) {
         level: loggingEvent.level.levelStr,
         category: loggingEvent.categoryName,
         hostname: os.hostname().toString(),
+        timestamp: loggingEvent.startTime.toISOString()
       },
       additionalTags,
       (error) => {