diff --git a/PROJECT_GUIDE.md b/PROJECT_GUIDE.md
index 8b0165e..9ef6b11 100644
--- a/PROJECT_GUIDE.md
+++ b/PROJECT_GUIDE.md
@@ -379,7 +379,7 @@ prefect_inventory_scheduler.py
 
 ### 10.1 调度目标
 
-当前通过 Prefect 定义了 2 个 deployment，都会在每天 `09:15` 和 `19:15`（`Asia/Shanghai`）执行：
+当前通过 Prefect 定义了 2 个 deployment，每个 deployment 用一条 cron 覆盖每天 `09:15` 和 `19:15`（`Asia/Shanghai`）：
 
 - 渠道库存统计并写入飞书
 - 批次库存统计报表并写入飞书
diff --git a/README.md b/README.md
index d8ffbe6..43a3179 100644
--- a/README.md
+++ b/README.md
@@ -169,7 +169,7 @@ PREFECT_API_URL
 
 ## Prefect 调度
 
-项目定义了两个 Prefect deployment：
+项目定义了两个 Prefect deployment，每个 deployment 用一条 cron 覆盖 09:15 和 19:15：
 
 - `channel-inventory-sync-0915-1915`：每天 09:15 和 19:15 执行渠道库存统计并写入飞书。
 - `batch-inventory-report-0915-1915`：每天 09:15 和 19:15 执行批次库存统计并写入飞书。
diff --git a/pyproject.toml b/pyproject.toml
index f736bca..568b413 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,8 +10,7 @@ requires-python = ">=3.11"
 dependencies = [
   "openpyxl>=3.1.2",
   "pandas",
-  "prefect==3.0.0",
-  "pydantic==2.8.2",
+  "prefect==3.6.8",
   "psycopg2-binary",
   "python-dotenv",
   "xlrd>=2.0.1",