diff --git a/server/planning/events/events.py b/server/planning/events/events.py
index 59bfc53b4..3ccf3f1d0 100644
--- a/server/planning/events/events.py
+++ b/server/planning/events/events.py
@@ -422,6 +422,8 @@ def on_update(self, updates, original):
             print(lock_user, str_user_id)
             raise SuperdeskApiError.forbiddenError("The item was locked by another user")
 
+        overwrite_event_expiry_date(updates, original)
+
         # If only the `recurring_rule` was provided, then fill in the rest from the original
         # This can happen, for example, when converting a single Event to a series of Recurring Events
         if list(updates.get("dates") or {}) == ["recurring_rule"]:
@@ -861,10 +863,14 @@ def setRecurringMode(event):
         event["dates"]["recurring_rule"]["count"] = None
 
 
-def overwrite_event_expiry_date(event):
-    if "expiry" in event:
-        expiry_minutes = app.settings.get("PLANNING_EXPIRY_MINUTES", None)
-        event["expiry"] = event["dates"]["end"] + timedelta(minutes=expiry_minutes or 0)
+def overwrite_event_expiry_date(updates, original=None):
+    if "expiry" in updates:
+        if original is None:
+            original = {}
+        updated = original.copy()
+        updated.update(updates)
+        expiry_minutes = app.config.get("PLANNING_EXPIRY_MINUTES", None)
+        updates["expiry"] = updated["dates"]["end"] + timedelta(minutes=expiry_minutes or 0)
 
 
 def generate_recurring_events(event):
diff --git a/server/planning/tests/events_test.py b/server/planning/tests/events_test.py
new file mode 100644
index 000000000..f0dcf46af
--- /dev/null
+++ b/server/planning/tests/events_test.py
@@ -0,0 +1,24 @@
+import unittest.mock as mock
+
+from . import TestCase
+
+from datetime import datetime
+
+from planning.events.events import overwrite_event_expiry_date
+
+
+class EventsExpiryTestCase(TestCase):
+    def test_expiry(self):
+        with mock.patch.dict(self.app.config, {"PLANNING_EXPIRY_MINUTES": 20}):
+            with self.app.app_context():
+                item = {"dates": {"end": datetime(2050, 1, 1, 10, 0)}, "expiry": datetime.now()}
+                overwrite_event_expiry_date(item)
+                assert item["expiry"] == datetime(2050, 1, 1, 10, 20)
+
+                updates = {"expiry": datetime.now()}
+                overwrite_event_expiry_date(updates, item)
+                assert updates["expiry"] == datetime(2050, 1, 1, 10, 20)
+
+                updates = {"expiry": datetime.now(), "dates": {"end": datetime(2060, 1, 1, 10, 0)}}
+                overwrite_event_expiry_date(updates, item)
+                assert updates["expiry"] == datetime(2060, 1, 1, 10, 20)