diff --git a/src/rfc9421/parse.ts b/src/rfc9421/parse.ts
index 93a49ff..ea80d2e 100644
--- a/src/rfc9421/parse.ts
+++ b/src/rfc9421/parse.ts
@@ -90,7 +90,7 @@ export function parseRFC9421RequestOrResponse(
 	if (!inputIsValid) throw new Error('signatureInput');
 
 	const factory = new RFC9421SignatureBaseFactory(
-		request, undefined, undefined, undefined,
+		request, undefined, options?.additionalSfvTypeDictionary, undefined,
 		options?.requiredComponents?.rfc9421 || options?.requiredInputs?.rfc9421,
 	);
 	const results = new Map<string, ParsedRFC9421SignatureValueWithBase>();
diff --git a/src/rfc9421/verify.ts b/src/rfc9421/verify.ts
index cf21b02..946108e 100644
--- a/src/rfc9421/verify.ts
+++ b/src/rfc9421/verify.ts
@@ -86,7 +86,7 @@ export async function verifyRFC9421Signature(
 		if (importedKeys.length === 0) {
 			importedKeys = await Promise.all(
 				Array.from(keys.values())
-					.map(key => parseAndImportPublicKey(key, ['verify']))
+					.map(key => parseAndImportPublicKey(key, ['verify']), alg)
 			);
 		}
 
@@ -127,7 +127,7 @@ export async function verifyRFC9421Signature(
 
 	for (const [label, parsed, key] of toVerify) {
 		try {
-			const { publicKey, algorithm } = await parseAndImportPublicKey(key, ['verify']);
+			const { publicKey, algorithm } = await parseAndImportPublicKey(key, ['verify'], alg);
 
 			const verify = await (await getWebcrypto()).subtle.verify(
 				algorithm, publicKey, base64.parse(parsed.signature), textEncoder.encode(parsed.base)
diff --git a/src/shared/verify.ts b/src/shared/verify.ts
index c1ee749..a0e0a04 100644
--- a/src/shared/verify.ts
+++ b/src/shared/verify.ts
@@ -87,7 +87,7 @@ export function parseSignInfo(algorithm: string | undefined, real: ParsedAlgorit
 			if (namedCurve !== 'P-384') {
 				throw new KeyHashValidationError(`curve is not P-384: ${namedCurve}`);
 			}
-			return { name: 'ECDSA', hash: 'SHA-256', namedCurve };
+			return { name: 'ECDSA', hash: 'SHA-384', namedCurve };
 		}
 
 		//#region Draft