diff --git a/4th-seminar/models/post.js b/4th-seminar/models/post.js
index 6674b5f..a174e7d 100644
--- a/4th-seminar/models/post.js
+++ b/4th-seminar/models/post.js
@@ -1,6 +1,3 @@
-const { DataTypes } = require("sequelize/types");
-const { sequelize } = require(".");
-
 module.exports = (sequelize, DataTypes) => {
     return sequelize.define('Post', {
         //모델의 Attributes (Column)을 정의하는 곳
diff --git "a/images/4\354\260\250 \354\205\210\353\202\230 ERD.png" "b/images/4\354\260\250 \354\205\210\353\202\230 ERD.png"
new file mode 100644
index 0000000..1ef7396
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diff --git a/images/erd.jpg b/images/erd.jpg
deleted file mode 100644
index a08abb5..0000000
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