diff --git a/cvat-ui/src/reducers/tasks-reducer.ts b/cvat-ui/src/reducers/tasks-reducer.ts
index 8efcde10750..ce2e88258c0 100644
--- a/cvat-ui/src/reducers/tasks-reducer.ts
+++ b/cvat-ui/src/reducers/tasks-reducer.ts
@@ -8,6 +8,7 @@ import { BoundariesActionTypes } from 'actions/boundaries-actions';
 import { TasksActionTypes } from 'actions/tasks-actions';
 import { AuthActionTypes } from 'actions/auth-actions';
 
+import { ProjectsActionTypes } from 'actions/projects-actions';
 import { TasksState } from '.';
 
 const defaultState: TasksState = {
@@ -77,6 +78,13 @@ export default (state: TasksState = defaultState, action: AnyAction): TasksState
                 initialized: true,
                 fetching: false,
             };
+        case ProjectsActionTypes.DELETE_PROJECT_SUCCESS: {
+            const { projectId } = action.payload;
+            return {
+                ...state,
+                current: state.current.filter((_task) => _task.projectId !== projectId),
+            };
+        }
         case TasksActionTypes.DELETE_TASK: {
             const { taskID } = action.payload;
             const { deletes } = state.activities;