diff --git a/CHANGELOG.md b/CHANGELOG.md
index 451e5432..b1d9f1c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Helm chart: Fix helm hook for db migration job
+- Performance improvements to `GET /api/internal/v1/alertgroups` endpoint by @joeyorlando and @iskhakov ([#1805](https://github.com/grafana/oncall/pull/1805))
 
 ## v1.2.14 (2023-04-19)
 
diff --git a/engine/apps/api/serializers/alert_group.py b/engine/apps/api/serializers/alert_group.py
index 91247463..aab66f71 100644
--- a/engine/apps/api/serializers/alert_group.py
+++ b/engine/apps/api/serializers/alert_group.py
@@ -99,6 +99,7 @@ class AlertGroupListSerializer(EagerLoadingMixin, AlertGroupFieldsCacheSerialize
 
     SELECT_RELATED = [
         "channel__organization",
+        "channel__team",
         "root_alert_group",
         "resolved_by_user",
         "acknowledged_by_user",