diff --git a/services/app-api/handlers/banners/create.test.ts b/services/app-api/handlers/banners/create.test.ts
index 7989eb48..37f826c8 100644
--- a/services/app-api/handlers/banners/create.test.ts
+++ b/services/app-api/handlers/banners/create.test.ts
@@ -27,6 +27,13 @@ const testEvent: APIGatewayProxyEvent = {
   headers: { "cognito-identity-id": "test" },
 };
 
+const testEventWithInvalidData: APIGatewayProxyEvent = {
+  ...proxyEvent,
+  body: `{"description":"test description","link":"test link","startDate":"1000","endDate":2000}`,
+  pathParameters: { bannerId: "testKey" },
+  headers: { "cognito-identity-id": "test" },
+};
+
 describe("Test createBanner API method", () => {
   beforeEach(() => {
     jest.clearAllMocks();
@@ -74,4 +81,9 @@ describe("Test createBanner API method", () => {
     expect(res.statusCode).toBe(StatusCodes.BadRequest);
     expect(res.body).toContain(error.MISSING_DATA);
   });
+
+  test("Test invalid data causes internal server error", async () => {
+    const res = await createBanner(testEventWithInvalidData);
+    expect(res.statusCode).toBe(StatusCodes.InternalServerError);
+  });
 });
diff --git a/services/app-api/handlers/banners/create.ts b/services/app-api/handlers/banners/create.ts
index abc4d6ce..621ec664 100644
--- a/services/app-api/handlers/banners/create.ts
+++ b/services/app-api/handlers/banners/create.ts
@@ -10,6 +10,17 @@ import {
 import { canWriteBanner } from "../../utils/authorization";
 import { parseBannerId } from "../../libs/param-lib";
 import { BannerData } from "../../types/banner";
+import { number, object, string } from "yup";
+import { validateData } from "../../utils/validation";
+
+const validationSchema = object().shape({
+  key: string().required(),
+  title: string().required(),
+  description: string().required(),
+  link: string().url().notRequired(),
+  startDate: number().required(),
+  endDate: number().required(),
+});
 
 export const createBanner = handler(parseBannerId, async (request) => {
   const { bannerId } = request.parameters;
@@ -25,9 +36,13 @@ export const createBanner = handler(parseBannerId, async (request) => {
 
   const unvalidatedPayload = request.body;
 
-  //TO DO: add validation & validation test back
+  const validatedPayload = await validateData(
+    validationSchema,
+    unvalidatedPayload
+  );
+
   const { title, description, link, startDate, endDate } =
-    unvalidatedPayload as BannerData;
+    validatedPayload as BannerData;
 
   const currentTime = Date.now();