diff --git a/package-lock.json b/package-lock.json
index a5272b4..f94319e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "SEE LICENSE IN LICENSE",
       "dependencies": {
         "@azure/functions": "^1.2.3",
-        "@types/busboy": "^0.2.3",
+        "@types/busboy": "^0.3.1",
         "@types/node": "^16.0.0",
         "busboy": "^0.3.1"
       },
@@ -1060,9 +1060,9 @@
       }
     },
     "node_modules/@types/busboy": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/@types/busboy/-/busboy-0.2.4.tgz",
-      "integrity": "sha512-f+ZCVjlcN8JW/zf3iR0GqO4gjOUlltMTtZjn+YR1mlK+MVu6esTiIecO0/GQlmYQPQLdBnc7+5vG3Xb+SkvFLw==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@types/busboy/-/busboy-0.3.1.tgz",
+      "integrity": "sha512-8BPLNy4x+7lbTOGkAyUIZrrPEZ7WzbO7YlVGMf9EZi9J9mqILEkYbt/kgVWQ7fizOISo1hM/7cAsWVTa7EhQDg==",
       "dependencies": {
         "@types/node": "*"
       }
@@ -6886,9 +6886,9 @@
       }
     },
     "@types/busboy": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/@types/busboy/-/busboy-0.2.4.tgz",
-      "integrity": "sha512-f+ZCVjlcN8JW/zf3iR0GqO4gjOUlltMTtZjn+YR1mlK+MVu6esTiIecO0/GQlmYQPQLdBnc7+5vG3Xb+SkvFLw==",
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@types/busboy/-/busboy-0.3.1.tgz",
+      "integrity": "sha512-8BPLNy4x+7lbTOGkAyUIZrrPEZ7WzbO7YlVGMf9EZi9J9mqILEkYbt/kgVWQ7fizOISo1hM/7cAsWVTa7EhQDg==",
       "requires": {
         "@types/node": "*"
       }
diff --git a/package.json b/package.json
index 489f32f..5d22dd7 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
   },
   "dependencies": {
     "@azure/functions": "^1.2.3",
-    "@types/busboy": "^0.2.3",
+    "@types/busboy": "^0.3.1",
     "@types/node": "^16.0.0",
     "busboy": "^0.3.1"
   }
diff --git a/src/index.ts b/src/index.ts
index ac9fbb1..c2ca860 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -6,7 +6,7 @@ import { ParsedMultipartFormData } from "./types/parsed-multipart-form-data.type
 import { Config } from "./types/config.type";
 
 export default async function parseMultipartFormData(
-  request: HttpRequest,
+  request: HttpRequest & { headers: { "content-type": string } },
   options?: Config
 ): Promise<ParsedMultipartFormData> {
   return new Promise((resolve, reject) => {
diff --git a/test/index.spec.ts b/test/index.spec.ts
index 1e4c4fd..f12ac78 100644
--- a/test/index.spec.ts
+++ b/test/index.spec.ts
@@ -4,7 +4,7 @@ import fs from "fs";
 import parseMultipartFormData from "../src/index";
 
 describe("index.js", () => {
-  let request: HttpRequest;
+  let request: HttpRequest & { headers: { "content-type": string } };
 
   beforeEach(async () => {
     const file1 = fs.readFileSync("test/fixture/dummy-data.json");
@@ -18,7 +18,7 @@ describe("index.js", () => {
       method: "POST",
       url: "http://localhost:7071/api/script/mongo-replace-collection",
       headers: {
-        ...body.getHeaders(),
+        ...(body.getHeaders() as FormData.Headers & { "content-type": string }),
       },
       body: body.getBuffer(),
       query: {},
@@ -44,7 +44,7 @@ describe("index.js", () => {
   });
 
   it("should reject the promise due to missing headers", async () => {
-    request.headers = {};
+    request.headers = {} as FormData.Headers & { "content-type": string };
     expect(async () => {
       await parseMultipartFormData(request);
     }).rejects.toThrow();