diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4686813..6d9e2c7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ All notable changes to this project will be documented in this file.
 - Added JSON endpoint for Shields.io (#304)
 - Django 3.0
 - `senddeletionnotices` command skips profiles with recent last_active_date
+- The "Update Check" API call can update check's description (#311)
 
 ### Bug Fixes
 - Don't set CSRF cookie on first visit. Signup is exempt from CSRF protection
diff --git a/hc/api/schemas.py b/hc/api/schemas.py
index bdd99f3b..fd1a87da 100644
--- a/hc/api/schemas.py
+++ b/hc/api/schemas.py
@@ -2,6 +2,7 @@ check = {
     "type": "object",
     "properties": {
         "name": {"type": "string", "maxLength": 100},
+        "desc": {"type": "string"},
         "tags": {"type": "string", "maxLength": 500},
         "timeout": {"type": "number", "minimum": 60, "maximum": 2592000},
         "grace": {"type": "number", "minimum": 60, "maximum": 2592000},
diff --git a/hc/api/tests/test_update_check.py b/hc/api/tests/test_update_check.py
index c6d78cc3..1e5076a8 100644
--- a/hc/api/tests/test_update_check.py
+++ b/hc/api/tests/test_update_check.py
@@ -164,3 +164,12 @@ class UpdateCheckTestCase(BaseTestCase):
         r = self.post(self.check.code, {"api_key": "X" * 32, "channels": None})
 
         self.assertEqual(r.status_code, 400)
+
+    def test_it_rejects_non_string_desc(self):
+        r = self.post(
+            self.check.code, {"api_key": "X" * 32, "desc": 123}
+        )
+
+        self.assertEqual(r.status_code, 400)
+
+        self.check.refresh_from_db()