diff --git a/CHANGELOG.md b/CHANGELOG.md
index b76d08c7..e4f0e04e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ All notable changes to this project will be documented in this file.
 ### Bug Fixes
 - Fix refreshing of the checks page filtered by tags (#221)
 - Escape asterisks in Slack messages (#223)
+- Fix a "invalid time format" in front.views.status_single on Windows hosts
 
 
 ## 1.5.0 - 2019-02-04
diff --git a/hc/front/tests/test_status_single.py b/hc/front/tests/test_status_single.py
index cb806c8a..c494cccc 100644
--- a/hc/front/tests/test_status_single.py
+++ b/hc/front/tests/test_status_single.py
@@ -29,7 +29,7 @@ class StatusSingleTestCase(BaseTestCase):
         doc = r.json()
 
         self.assertEqual(doc["status"], "up")
-        self.assertEqual(doc["updated"], p.created.strftime("%s.%f"))
+        self.assertEqual(doc["updated"], str(p.created.timestamp()))
         self.assertTrue("test-user-agent" in doc["events"])
 
     def test_it_omits_events(self):
diff --git a/hc/front/views.py b/hc/front/views.py
index 070248ec..4737e6ce 100644
--- a/hc/front/views.py
+++ b/hc/front/views.py
@@ -494,7 +494,7 @@ def status_single(request, code):
     events = _get_events(check, 20)
     updated = "1"
     if len(events):
-        updated = events[0].created.strftime("%s.%f")
+        updated = str(events[0].created.timestamp())
 
     doc = {
         "status": status,