diff --git a/db/dm8/maku.sql b/db/dm8/maku.sql
index c629077..f41a0e1 100644
--- a/db/dm8/maku.sql
+++ b/db/dm8/maku.sql
@@ -215,7 +215,7 @@ COMMENT ON COLUMN sys_user_post.update_time IS '更新时间';
 create table sys_menu
 (
     id          bigint IDENTITY NOT NULL,
-    pid         bigint NOT NULL,
+    pid         bigint,
     name        varchar(200),
     url         varchar(200),
     authority   varchar(500),
diff --git a/db/postgresql/maku.sql b/db/postgresql/maku.sql
index 81a475a..3bbe432 100644
--- a/db/postgresql/maku.sql
+++ b/db/postgresql/maku.sql
@@ -216,7 +216,7 @@ COMMENT ON COLUMN sys_user_post.update_time IS '更新时间';
 create table sys_menu
 (
     id          bigserial NOT NULL,
-    pid         int8 NOT NULL,
+    pid         int8,
     name        varchar(200),
     url         varchar(200),
     authority   varchar(500),