diff --git a/scrapyd/webservice.py b/scrapyd/webservice.py
index 0757e7e20..95ce72fb7 100644
--- a/scrapyd/webservice.py
+++ b/scrapyd/webservice.py
@@ -1,6 +1,7 @@
 import traceback
 import uuid
 from cStringIO import StringIO
+from datetime import datetime
 
 from twisted.python import log
 
@@ -96,7 +97,9 @@ class ListJobs(WsResource):
         running = [{"id": s.job, "spider": s.spider} for s in spiders if s.project == project]
         queue = self.root.poller.queues[project]
         pending = [{"id": x["_job"], "spider": x["name"]} for x in queue.list()]
-        finished = [{"id": s.job, "spider": s.spider} for s in self.root.launcher.finished
+        finished = [{"id": s.job, "spider": s.spider,
+            "start_time": datetime.isoformat(s.start_time),
+            "end_time": datetime.isoformat(s.end_time)} for s in self.root.launcher.finished
             if s.project == project]
         return {"status":"ok", "pending": pending, "running": running, "finished": finished}