diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1bb32d49..c9bfcf89 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,9 +67,9 @@ jobs:
           # 扫描路径，. 表示扫描整个仓库
           path: .
           # 基础提交哈希，用于与当前提交进行比较
-          base: ${{ github.event.before }}
+          base: ${{ github.event.pull_request.base.sha }}
           # 当前提交哈希，作为扫描的目标版本
-          head: ${{ github.sha }}
+          head: ${{ github.event.pull_request.head.sha }}
 
   # 构建和测试 job（并行执行）
   build-and-test: