diff --git a/src/uploaders/config.ts b/src/uploaders/config.ts
index 2ee2f9a..83874f6 100644
--- a/src/uploaders/config.ts
+++ b/src/uploaders/config.ts
@@ -7,11 +7,11 @@ import type { Uploader } from './types.ts';
 
 /** Meta-uploader determined from configuration. */
 const configUploader: Uploader = {
-  upload(file, signal) {
-    return uploader().upload(file, signal);
+  upload(file, opts) {
+    return uploader().upload(file, opts);
   },
-  delete(cid, signal) {
-    return uploader().delete(cid, signal);
+  delete(cid, opts) {
+    return uploader().delete(cid, opts);
   },
 };
 
diff --git a/src/uploaders/ipfs.ts b/src/uploaders/ipfs.ts
index 5d82e2d..6e0e0e7 100644
--- a/src/uploaders/ipfs.ts
+++ b/src/uploaders/ipfs.ts
@@ -18,7 +18,7 @@ const ipfsAddResponseSchema = z.object({
  * and upload the file using the REST API.
  */
 const ipfsUploader: Uploader = {
-  async upload(file, signal) {
+  async upload(file, opts) {
     const url = new URL('/api/v0/add', Conf.ipfs.apiUrl);
 
     const formData = new FormData();
@@ -27,7 +27,7 @@ const ipfsUploader: Uploader = {
     const response = await fetchWorker(url, {
       method: 'POST',
       body: formData,
-      signal,
+      signal: opts?.signal,
     });
 
     const { Hash } = ipfsAddResponseSchema.parse(await response.json());
@@ -36,7 +36,7 @@ const ipfsUploader: Uploader = {
       cid: Hash,
     };
   },
-  async delete(cid, signal) {
+  async delete(cid, opts) {
     const url = new URL('/api/v0/pin/rm', Conf.ipfs.apiUrl);
 
     const query = new URLSearchParams();
@@ -46,7 +46,7 @@ const ipfsUploader: Uploader = {
 
     await fetchWorker(url, {
       method: 'POST',
-      signal,
+      signal: opts?.signal,
     });
   },
 };
diff --git a/src/uploaders/s3.ts b/src/uploaders/s3.ts
index 2e02cc3..378b279 100644
--- a/src/uploaders/s3.ts
+++ b/src/uploaders/s3.ts
@@ -9,10 +9,9 @@ import type { Uploader } from './types.ts';
  * take advantage of IPFS features while not really using IPFS.
  */
 const s3Uploader: Uploader = {
-  async upload(file, _signal) {
+  async upload(file) {
     const cid = await IpfsHash.of(file.stream()) as string;
 
-    // FIXME: Can't cancel S3 requests: https://github.com/bradenmacdonald/deno-s3-lite-client/issues/24
     await client().putObject(`ipfs/${cid}`, file.stream(), {
       metadata: {
         'Content-Type': file.type,
@@ -24,8 +23,7 @@ const s3Uploader: Uploader = {
       cid,
     };
   },
-  async delete(cid, _signal) {
-    // FIXME: Can't cancel S3 requests: https://github.com/bradenmacdonald/deno-s3-lite-client/issues/24
+  async delete(cid) {
     await client().deleteObject(`ipfs/${cid}`);
   },
 };
diff --git a/src/uploaders/types.ts b/src/uploaders/types.ts
index 8f11545..8898048 100644
--- a/src/uploaders/types.ts
+++ b/src/uploaders/types.ts
@@ -1,9 +1,9 @@
 /** Modular uploader interface, to support uploading to different backends. */
 interface Uploader {
   /** Upload the file to the backend. */
-  upload(file: File, signal?: AbortSignal): Promise<UploadResult>;
+  upload(file: File, opts?: { signal?: AbortSignal }): Promise<UploadResult>;
   /** Delete the file from the backend. */
-  delete(cid: string, signal?: AbortSignal): Promise<void>;
+  delete(cid: string, opts?: { signal?: AbortSignal }): Promise<void>;
 }
 
 /** Return value from the uploader after uploading a file. */