diff --git a/src/api/models/index.ts b/src/api/models/index.ts
index 353dfd35..2519d950 100644
--- a/src/api/models/index.ts
+++ b/src/api/models/index.ts
@@ -27,7 +27,7 @@ export interface StudyGroup extends Entity {
 export interface Event extends Entity {
 	name: string;
 	room: Room[];
-	group: StudyGroup;
+	group: StudyGroup[];
 	lecturer: Lecturer[];
 	start_ts: string;
 	end_ts: string;
diff --git a/src/api/timetable/TimetableEventApi.ts b/src/api/timetable/TimetableEventApi.ts
index 10ce410b..dc8e0acf 100644
--- a/src/api/timetable/TimetableEventApi.ts
+++ b/src/api/timetable/TimetableEventApi.ts
@@ -4,7 +4,7 @@ import { TimetableEntityBaseApi } from './TimetaableEntityBaseApi';
 
 type ModifyEventBody = Pick<Event, 'name' | 'start_ts' | 'end_ts'> & {
 	room_id: number[];
-	group_id: number;
+	group_id: number[];
 	lecturer_id: number[];
 };
 
diff --git a/src/components/EventRow.vue b/src/components/EventRow.vue
index 730db3bf..36456da0 100644
--- a/src/components/EventRow.vue
+++ b/src/components/EventRow.vue
@@ -28,7 +28,7 @@ const info = computed(() => {
 	}
 
 	if (props.info.includes('group')) {
-		arr.push(props.event.group.number);
+		arr.push(props.event.group.map(g => g.number).join(', '));
 	}
 
 	return arr.filter(c => Boolean(c)).join(' • ');
diff --git a/src/views/timetable/event/AsyncContent.vue b/src/views/timetable/event/AsyncContent.vue
index 32b09927..311df4bd 100644
--- a/src/views/timetable/event/AsyncContent.vue
+++ b/src/views/timetable/event/AsyncContent.vue
@@ -70,7 +70,7 @@ const lecturers = computed(() => {
 <template>
 	<h2 class="h2">{{ event?.name }}</h2>
 
-	<DataRow title="Группа" :info="event?.group.number" class="row">
+	<DataRow title="Группа" :info="event?.group.map(g => g.number).join(', ')" class="row">
 		<MaterialIcon name="group" class="icon" />
 	</DataRow>