diff --git a/app/soapbox/normalizers/notification.ts b/app/soapbox/normalizers/notification.ts
index 2412db05d..45eb93fb3 100644
--- a/app/soapbox/normalizers/notification.ts
+++ b/app/soapbox/normalizers/notification.ts
@@ -25,8 +25,19 @@ export const NotificationRecord = ImmutableRecord({
   total_count: null as number | null, // grouped notifications
 });
 
+const normalizeType = (notification: ImmutableMap<string, any>) => {
+  if (notification.get('type') === 'group_mention') {
+    return notification.set('type', 'mention');
+  }
+
+  return notification;
+};
+
 export const normalizeNotification = (notification: Record<string, any>) => {
   return NotificationRecord(
-    ImmutableMap(fromJS(notification)),
+    ImmutableMap(fromJS(notification))
+      .withMutations((notification: ImmutableMap<string, any>) => {
+        normalizeType(notification);
+      }),
   );
 };
diff --git a/app/soapbox/reducers/notifications.ts b/app/soapbox/reducers/notifications.ts
index 24185ee0a..f563fce83 100644
--- a/app/soapbox/reducers/notifications.ts
+++ b/app/soapbox/reducers/notifications.ts
@@ -88,12 +88,12 @@ const isValid = (notification: APIEntity) => {
     }
 
     // https://gitlab.com/soapbox-pub/soapbox/-/issues/424
-    if (!notification.account.id) {
+    if (!notification.account.get('id')) {
       return false;
     }
 
     // Mastodon can return status notifications with a null status
-    if (['mention', 'reblog', 'favourite', 'poll', 'status'].includes(notification.type) && !notification.status.id) {
+    if (['mention', 'reblog', 'favourite', 'poll', 'status'].includes(notification.type) && !notification.status.get('id')) {
       return false;
     }
 
@@ -131,6 +131,7 @@ const importNotification = (state: State, notification: APIEntity) => {
 export const processRawNotifications = (notifications: APIEntity[]) => (
   ImmutableOrderedMap(
     notifications
+      .map(normalizeNotification)
       .filter(isValid)
       .map(n => [n.id, fixNotification(n)]),
   ));