diff --git a/cli/main.py b/cli/main.py
index 8e3933a..3395d92 100644
--- a/cli/main.py
+++ b/cli/main.py
@@ -223,7 +223,7 @@ def task_show(ctx, id):
 @task.command("update")
 @click.argument("task_id")
 @click.option("--status", type=click.Choice(
-    ["pending", "in_progress", "review", "done", "blocked", "decomposed"]),
+    ["pending", "in_progress", "review", "done", "blocked", "decomposed", "cancelled"]),
     default=None, help="New status")
 @click.option("--priority", type=int, default=None, help="New priority (1-10)")
 @click.pass_context
diff --git a/tests/test_api.py b/tests/test_api.py
index 48ce340..d8939d1 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -256,9 +256,9 @@ def test_patch_task_status_persisted(client):
     assert r.json()["status"] == "blocked"
 
 
-@pytest.mark.parametrize("status", ["pending", "in_progress", "review", "done", "blocked"])
+@pytest.mark.parametrize("status", ["pending", "in_progress", "review", "done", "blocked", "cancelled"])
 def test_patch_task_all_valid_statuses(client, status):
-    """Все 5 допустимых статусов должны приниматься."""
+    """Все 6 допустимых статусов должны приниматься."""
     r = client.patch("/api/tasks/P1-001", json={"status": status})
     assert r.status_code == 200
     assert r.json()["status"] == status
diff --git a/web/api.py b/web/api.py
index cd38861..52ebbe2 100644
--- a/web/api.py
+++ b/web/api.py
@@ -141,7 +141,7 @@ class TaskPatch(BaseModel):
     status: str
 
 
-VALID_STATUSES = {"pending", "in_progress", "review", "done", "blocked"}
+VALID_STATUSES = {"pending", "in_progress", "review", "done", "blocked", "cancelled"}
 
 
 @app.patch("/api/tasks/{task_id}")
diff --git a/web/frontend/src/views/ProjectView.vue b/web/frontend/src/views/ProjectView.vue
index 13a9ceb..5ceb196 100644
--- a/web/frontend/src/views/ProjectView.vue
+++ b/web/frontend/src/views/ProjectView.vue
@@ -108,7 +108,7 @@ const filteredDecisions = computed(() => {
 function taskStatusColor(s: string) {
   const m: Record<string, string> = {
     pending: 'gray', in_progress: 'blue', review: 'purple',
-    done: 'green', blocked: 'red', decomposed: 'yellow',
+    done: 'green', blocked: 'red', decomposed: 'yellow', cancelled: 'gray',
   }
   return m[s] || 'gray'
 }
diff --git a/web/frontend/src/views/TaskDetail.vue b/web/frontend/src/views/TaskDetail.vue
index 8a0ad6b..34aa4af 100644
--- a/web/frontend/src/views/TaskDetail.vue
+++ b/web/frontend/src/views/TaskDetail.vue
@@ -76,7 +76,7 @@ onUnmounted(stopPolling)
 function statusColor(s: string) {
   const m: Record<string, string> = {
     pending: 'gray', in_progress: 'blue', review: 'yellow',
-    done: 'green', blocked: 'red', decomposed: 'purple',
+    done: 'green', blocked: 'red', decomposed: 'purple', cancelled: 'gray',
   }
   return m[s] || 'gray'
 }
@@ -228,6 +228,7 @@ async function changeStatus(newStatus: string) {
           <option value="review">review</option>
           <option value="done">done</option>
           <option value="blocked">blocked</option>
+          <option value="cancelled">cancelled</option>
         </select>
         <span v-if="isRunning" class="inline-block w-2 h-2 bg-blue-500 rounded-full animate-pulse"></span>
         <span class="text-xs text-gray-600">pri {{ task.priority }}</span>