diff --git a/src/Splunk.Logging.Common/HttpEventCollectorEventInfo.cs b/src/Splunk.Logging.Common/HttpEventCollectorEventInfo.cs
index 3db64e8..9b8a3d3 100644
--- a/src/Splunk.Logging.Common/HttpEventCollectorEventInfo.cs
+++ b/src/Splunk.Logging.Common/HttpEventCollectorEventInfo.cs
@@ -176,7 +176,7 @@ public HttpEventCollectorEventInfo(
         {
             double epochTime = (datetime - new DateTime(1970, 1, 1)).TotalSeconds;
             // truncate to 3 digits after floating point
-            Timestamp = epochTime.ToString("#.000", Thread.CurrentThread.CurrentCulture);
+            Timestamp = epochTime.ToString("#.000", CultureInfo.GetCultureInfo("en-US"));
             this.metadata = metadata ?? new Metadata();
             Event = new LoggerEvent(id, severity, message, data);
         }