diff --git a/package.json b/package.json
index 7b085ecf8..5aaa7751d 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "cross-env": "^7",
     "fs-jetpack": "^4",
     "sequelize": "^6",
-    "@sequelize/core": "^7.0.0-alpha.10",
+    "@sequelize/core": "^7.0.0-alpha.27",
     "sinon": "^13",
     "sinon-chai": "^3"
   },
@@ -52,6 +52,6 @@
     "lodash": "^4.17.21",
     "sqlite3": "^5",
     "ts-node": "^10.4.0",
-    "typescript": "~4.5"
+    "typescript": "5.0"
   }
 }
diff --git a/src/sscce-sequelize-6.ts b/src/sscce-sequelize-6.ts
deleted file mode 100644
index c90761b96..000000000
--- a/src/sscce-sequelize-6.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import { DataTypes, Model } from 'sequelize';
-import { createSequelize6Instance } from '../setup/create-sequelize-instance';
-import { expect } from 'chai';
-import sinon from 'sinon';
-
-// if your issue is dialect specific, remove the dialects you don't need to test on.
-export const testingOnDialects = new Set(['mssql', 'sqlite', 'mysql', 'mariadb', 'postgres', 'postgres-native']);
-
-// You can delete this file if you don't want your SSCCE to be tested against Sequelize 6
-
-// Your SSCCE goes inside this function.
-export async function run() {
-  // This function should be used instead of `new Sequelize()`.
-  // It applies the config for your SSCCE to work on CI.
-  const sequelize = createSequelize6Instance({
-    logQueryParameters: true,
-    benchmark: true,
-    define: {
-      // For less clutter in the SSCCE
-      timestamps: false,
-    },
-  });
-
-  class Foo extends Model {}
-
-  Foo.init({
-    name: DataTypes.TEXT,
-  }, {
-    sequelize,
-    modelName: 'Foo',
-  });
-
-  // You can use sinon and chai assertions directly in your SSCCE.
-  const spy = sinon.spy();
-  sequelize.afterBulkSync(() => spy());
-  await sequelize.sync({ force: true });
-  expect(spy).to.have.been.called;
-
-  console.log(await Foo.create({ name: 'TS foo' }));
-  expect(await Foo.count()).to.equal(1);
-}
diff --git a/src/sscce-sequelize-7.ts b/src/sscce-sequelize-7.ts
index 861b9fdea..f06ceb855 100644
--- a/src/sscce-sequelize-7.ts
+++ b/src/sscce-sequelize-7.ts
@@ -1,18 +1,39 @@
-import { DataTypes, Model } from '@sequelize/core';
-import { createSequelize7Instance } from '../setup/create-sequelize-instance';
-import { expect } from 'chai';
-import sinon from 'sinon';
+import { DataTypes, Model } from "@sequelize/core";
+import { createSequelize7Instance } from "../setup/create-sequelize-instance";
+import { Attribute } from "@sequelize/core/decorators-legacy";
+import type { Sequelize } from "@sequelize/core";
+import { expect } from "chai";
 
 // if your issue is dialect specific, remove the dialects you don't need to test on.
-export const testingOnDialects = new Set(['mssql', 'sqlite', 'mysql', 'mariadb', 'postgres', 'postgres-native']);
+export const testingOnDialects = new Set([
+  "mssql",
+  "sqlite",
+  "mysql",
+  "mariadb",
+  "postgres",
+  "postgres-native",
+]);
 
 // You can delete this file if you don't want your SSCCE to be tested against Sequelize 7
+class User extends Model {
+  @Attribute({
+    type: DataTypes.STRING,
+    allowNull: false,
+  })
+  declare username: string;
+
+  @Attribute({
+    type: DataTypes.DATE,
+    allowNull: false,
+  })
+  declare birthday: Date;
+}
 
 // Your SSCCE goes inside this function.
 export async function run() {
   // This function should be used instead of `new Sequelize()`.
   // It applies the config for your SSCCE to work on CI.
-  const sequelize = createSequelize7Instance({
+  let sequelize: Sequelize | undefined = createSequelize7Instance({
     logQueryParameters: true,
     benchmark: true,
     define: {
@@ -20,22 +41,42 @@ export async function run() {
       timestamps: false,
     },
   });
+  sequelize.addModels([User]);
+  await sequelize.sync({ force: true });
+
+  const jane = await User.create({
+    username: "janedoe",
+    birthday: new Date(1980, 6, 20),
+  });
 
-  class Foo extends Model {}
+  console.log("\nJane:", jane.toJSON());
 
-  Foo.init({
-    name: DataTypes.TEXT,
-  }, {
-    sequelize,
-    modelName: 'Foo',
+  await sequelize.close();
+  sequelize = undefined;
+
+  expect(jane.username).to.equal("janedoe");
+
+  const anotherSequelize = createSequelize7Instance({
+    logQueryParameters: true,
+    benchmark: true,
+    define: {
+      // For less clutter in the SSCCE
+      timestamps: false,
+    },
   });
 
-  // You can use sinon and chai assertions directly in your SSCCE.
-  const spy = sinon.spy();
-  sequelize.afterBulkSync(() => spy());
-  await sequelize.sync({ force: true });
-  expect(spy).to.have.been.called;
+  // Since the previous instance has been closed
+  // I expect that I can create another instance
+  // and associate the model to this instance
+  anotherSequelize.addModels([User]);
+
+  const john = await User.create({
+    username: "johndoe",
+    birthday: new Date(1990, 6, 20),
+  });
+  console.log("John:", john.toJSON());
+
+  await anotherSequelize.close();
 
-  console.log(await Foo.create({ name: 'TS foo' }));
-  expect(await Foo.count()).to.equal(1);
+  expect(john.username).to.equal("johndoe");
 }
diff --git a/tsconfig.json b/tsconfig.json
index b17064f0e..2464dd4f0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,10 +5,11 @@
   ],
   "compilerOptions": {
     "target": "es2021",
-    "module": "CommonJS",
-    "moduleResolution": "Node",
+    "module": "Node16",
+    "moduleResolution": "Node16",
     "esModuleInterop": true,
     "resolveJsonModule": true,
+    "experimentalDecorators": true,
     "newLine": "lf",
     "stripInternal": true,
     "strict": true,