diff --git a/src/index.ts b/src/index.ts
index 4413704..202cfa7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -211,15 +211,15 @@ export class IntegrityMetadataSet {
 }
 
 export async function createIntegrityMetadataSet(
-  hashAlgorithms: HashAlgorithm[],
+  hashAlgorithms: ReadonlyArray<HashAlgorithm> | HashAlgorithm,
   data: ArrayBuffer,
   options: IntegrityMetadataSetOptions = {
     getPrioritizedHashAlgorithm,
   },
 ): Promise<IntegrityMetadataSet> {
-  const integrityMetadata = await Promise.all(
-    hashAlgorithms.map((alg) => createIntegrityMetadata(alg, data)),
+  const set = await Promise.all(
+    [hashAlgorithms].flat().map((alg) => createIntegrityMetadata(alg, data)),
   );
 
-  return new IntegrityMetadataSet(integrityMetadata.join(" "), options);
+  return new IntegrityMetadataSet(set, options);
 }
diff --git a/test/create-integrity-metadata-set.js b/test/create-integrity-metadata-set.js
index 442e686..faffe1a 100644
--- a/test/create-integrity-metadata-set.js
+++ b/test/create-integrity-metadata-set.js
@@ -9,7 +9,7 @@ import {
 test("instantiate a new IntegrityMetadataSet", async function () {
   const res = new Response("Hello, world!");
   const data = await res.arrayBuffer();
-  const set = await createIntegrityMetadataSet(["sha256"], data);
+  const set = await createIntegrityMetadataSet("sha256", data);
 
   assert(set instanceof IntegrityMetadataSet);
 });