diff --git a/buildspec.yml b/buildspec.yml
index f093bb8b8..2f86f8fd3 100644
--- a/buildspec.yml
+++ b/buildspec.yml
@@ -3,6 +3,7 @@ phases:
   pre_build:
     commands:
       - export LC_ALL="en_US.utf8"
+      - export TZ="Asia/Seoul"
   build:
     commands:
       - echo Build Starting on `date`
diff --git a/src/main/resources/db/migration/V3_1__Modify_administrator.sql b/src/main/resources/db/migration/V3_1__Modify_administrator.sql
deleted file mode 100644
index 59ad3f17a..000000000
--- a/src/main/resources/db/migration/V3_1__Modify_administrator.sql
+++ /dev/null
@@ -1,5 +0,0 @@
-alter table administrator
-    modify name varchar(30) not null,
-    add username varchar(30) not null after password,
-    add constraint uk_administrator unique (username),
-    drop index `UK_qv926x9u07ru5erc4vn3lxhcg`;
diff --git a/src/main/resources/db/migration/V3_4__Assignment_note_longer.sql b/src/main/resources/db/migration/V3_4__Assignment_note_longer.sql
deleted file mode 100644
index 0bfce9ca9..000000000
--- a/src/main/resources/db/migration/V3_4__Assignment_note_longer.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-alter table assignment
-    modify note varchar(5000) not null;
diff --git a/src/main/resources/db/migration/V3_2__Add_judgment_tables.sql b/src/main/resources/db/migration/V3__Create_judgment_tables_and_alter_administrator_table.sql
similarity index 83%
rename from src/main/resources/db/migration/V3_2__Add_judgment_tables.sql
rename to src/main/resources/db/migration/V3__Create_judgment_tables_and_alter_administrator_table.sql
index d80b4a7b6..d6e3f9ab8 100644
--- a/src/main/resources/db/migration/V3_2__Add_judgment_tables.sql
+++ b/src/main/resources/db/migration/V3__Create_judgment_tables_and_alter_administrator_table.sql
@@ -43,3 +43,12 @@ alter table judgment_record
     add constraint fk_judgment_record_judgment_id_ref_judgment_id
         foreign key (judgment_id)
             references judgment (id);
+
+alter table administrator
+    modify name varchar(30) not null,
+    add username varchar(30) not null after password,
+    add constraint uk_administrator unique (username),
+    drop index `UK_qv926x9u07ru5erc4vn3lxhcg`;
+
+alter table assignment
+    modify note varchar(5000) not null;