diff --git a/tracereq/transport.py b/tracereq/transport.py
index 344b5f4..3f7f0ad 100644
--- a/tracereq/transport.py
+++ b/tracereq/transport.py
@@ -40,6 +40,7 @@ def __init__(self, token, dest):
 
     def send(self, trace_doc):
         try:
+            trace_doc['timestamp'] = datetime.utcnow()
             self.session.request(
                 'POST',
                 self.dest,