diff --git a/internal/store/store.go b/internal/store/store.go
index 5320944..1afefe4 100644
--- a/internal/store/store.go
+++ b/internal/store/store.go
@@ -86,7 +86,9 @@ func OpenSQLite(path string) (*Store, error) {
 	}
 	// _txlock=immediate：写事务在 BEGIN 即取库写锁（而非首个写语句升级），
 	// 跨进程迁移/写路径依赖 busy_timeout 排队而不是中途 SQLITE_BUSY（KTD8）。
-	dsn := fmt.Sprintf("file:%s?_pragma=busy_timeout(5000)&_pragma=journal_mode(WAL)&_pragma=foreign_keys(1)&_txlock=immediate", path)
+	// busy_timeout 30s：迁移竞争测试在慢速 CI 盘上 4 个迁移者串行全程可超 5s
+	// （实测 job 2285 SQLITE_BUSY）；本地档宁可排队不报错。
+	dsn := fmt.Sprintf("file:%s?_pragma=busy_timeout(30000)&_pragma=journal_mode(WAL)&_pragma=foreign_keys(1)&_txlock=immediate", path)
 	db, err := sql.Open("sqlite", dsn)
 	if err != nil {
 		return nil, err