diff --git a/api/src/main/resources/db.sql b/api/src/main/resources/db.sql
index 6c814ce..c38fc6c 100644
--- a/api/src/main/resources/db.sql
+++ b/api/src/main/resources/db.sql
@@ -41,5 +41,5 @@ create table sign_record
     uid         int(10)     not null,
     point       int(10)     not null,
     ip          varchar(50) not null,
-    create_time datetime    not null
+    create_time datetime    default current_timestamp
 ) engine = innodb comment '打卡记录表';
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