diff --git a/package.json b/package.json
index b2cc7ae..aff6568 100644
--- a/package.json
+++ b/package.json
@@ -76,7 +76,7 @@
     "eslint": "^8.48.0",
     "eslint-plugin-simple-import-sort": "^10.0.0",
     "express": "^4.18.2",
-    "form-data-encoder": "^3.0.0",
+    "form-data-encoder": "^4.0.2",
     "graphql": "^16.8.0",
     "koa": "^2.14.2",
     "prettier": "^3.0.2",
diff --git a/test/abortingMultipartRequest.mjs b/test/abortingMultipartRequest.mjs
index a699435..75fa57c 100644
--- a/test/abortingMultipartRequest.mjs
+++ b/test/abortingMultipartRequest.mjs
@@ -23,10 +23,7 @@ export default async function abortingMultipartRequest(
   requestReceived,
 ) {
   const abortController = new AbortController();
-  const encoder = new FormDataEncoder(
-    // @ts-expect-error https://github.com/octet-stream/form-data-encoder/issues/16
-    formData,
-  );
+  const encoder = new FormDataEncoder(formData);
 
   try {
     await fetch(url, {