diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9dd3c488..1ee52681 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ All notable changes to this project will be documented in this file.
 - Drop API support for GET, DELETE requests with a request body
 - Add missing @csrf_exempt annotations in API views
 - Fix the ping handler to reject status codes > 255
+- Add 'schemaVersion' field in the shields.io endpoint (#566)
 
 ## v1.22.0 - 2020-08-06
 
diff --git a/hc/api/tests/test_badge.py b/hc/api/tests/test_badge.py
index cd2488e2..25e188fb 100644
--- a/hc/api/tests/test_badge.py
+++ b/hc/api/tests/test_badge.py
@@ -90,4 +90,7 @@ class BadgeTestCase(BaseTestCase):
 
     def test_it_returns_shields_json(self):
         doc = self.client.get(self.shields_url).json()
-        self.assertEqual(doc, {"label": "foo", "message": "up", "color": "success"})
+        self.assertEqual(
+            doc,
+            {"schemaVersion": 1, "label": "foo", "message": "up", "color": "success"},
+        )
diff --git a/hc/api/views.py b/hc/api/views.py
index 660f3f5a..aec09cc6 100644
--- a/hc/api/views.py
+++ b/hc/api/views.py
@@ -461,7 +461,9 @@ def badge(request, badge_key, signature, tag, fmt):
         elif status == "late":
             color = "important"
 
-        return JsonResponse({"label": label, "message": status, "color": color})
+        return JsonResponse(
+            {"schemaVersion": 1, "label": label, "message": status, "color": color}
+        )
 
     if fmt == "json":
         return JsonResponse(