diff --git a/src/crypto/sha/sha1.test.ts b/src/crypto/sha/sha1.test.ts
index 0a5b6e5..106ae2c 100644
--- a/src/crypto/sha/sha1.test.ts
+++ b/src/crypto/sha/sha1.test.ts
@@ -2,7 +2,7 @@ import { expect, test } from "vitest";
 import { sha1 } from "./sha1.js";
 
 test("sha256()", async () => {
-	const randomValues = crypto.getRandomValues(new Uint8Array(100));
+	const randomValues = crypto.getRandomValues(new Uint8Array(200));
 	for (let i = 0; i < randomValues.byteLength + 1; i++) {
 		const data = randomValues.slice(0, i);
 		const result = sha1(data);
diff --git a/src/crypto/sha/sha256.test.ts b/src/crypto/sha/sha256.test.ts
index 2363562..4dc3660 100644
--- a/src/crypto/sha/sha256.test.ts
+++ b/src/crypto/sha/sha256.test.ts
@@ -2,7 +2,7 @@ import { expect, test } from "vitest";
 import { sha256 } from "./sha256.js";
 
 test("sha256()", async () => {
-	const randomValues = crypto.getRandomValues(new Uint8Array(100));
+	const randomValues = crypto.getRandomValues(new Uint8Array(200));
 	for (let i = 0; i < randomValues.byteLength + 1; i++) {
 		const data = randomValues.slice(0, i);
 		const result = sha256(data);
diff --git a/src/crypto/sha/sha384.test.ts b/src/crypto/sha/sha384.test.ts
index 07f4ec8..90260c5 100644
--- a/src/crypto/sha/sha384.test.ts
+++ b/src/crypto/sha/sha384.test.ts
@@ -2,7 +2,7 @@ import { expect, test } from "vitest";
 import { sha384 } from "./sha384.js";
 
 test("sha384()", async () => {
-	const randomValues = crypto.getRandomValues(new Uint8Array(100));
+	const randomValues = crypto.getRandomValues(new Uint8Array(200));
 	for (let i = 0; i < randomValues.byteLength + 1; i++) {
 		const data = randomValues.slice(0, i);
 		const result = sha384(data);
diff --git a/src/crypto/sha/sha384.ts b/src/crypto/sha/sha384.ts
index 80ed7dd..34a16af 100644
--- a/src/crypto/sha/sha384.ts
+++ b/src/crypto/sha/sha384.ts
@@ -100,11 +100,11 @@ export function sha384(data: Uint8Array): Uint8Array {
 	]);
 
 	const l = data.byteLength * 8;
-	const targetLength = Math.ceil((data.length + 1 + 8) / 128) * 128;
+	const targetLength = Math.ceil((data.length + 1 + 16) / 128) * 128;
 	const buffer = new Uint8Array(targetLength);
 	buffer[data.length] = 0x80;
 	buffer.set(data);
-	bigEndian.putUint32(buffer, l, targetLength - 4);
+	bigEndian.putUint64(buffer, BigInt(l), targetLength - 8);
 	for (let i = 0; i < buffer.length; i += 128) {
 		for (let t = 0; t < 16; t++) {
 			w[t] =
diff --git a/src/crypto/sha/sha512.test.ts b/src/crypto/sha/sha512.test.ts
index 1431042..d1e5650 100644
--- a/src/crypto/sha/sha512.test.ts
+++ b/src/crypto/sha/sha512.test.ts
@@ -2,7 +2,7 @@ import { expect, test } from "vitest";
 import { sha512 } from "./sha512.js";
 
 test("sha512()", async () => {
-	const randomValues = crypto.getRandomValues(new Uint8Array(100));
+	const randomValues = crypto.getRandomValues(new Uint8Array(200));
 	for (let i = 0; i < randomValues.byteLength + 1; i++) {
 		const data = randomValues.slice(0, i);
 		const result = sha512(data);
diff --git a/src/crypto/sha/sha512.ts b/src/crypto/sha/sha512.ts
index 30e9b45..9c54059 100644
--- a/src/crypto/sha/sha512.ts
+++ b/src/crypto/sha/sha512.ts
@@ -100,11 +100,11 @@ export function sha512(data: Uint8Array): Uint8Array {
 	]);
 
 	const l = data.byteLength * 8;
-	const targetLength = Math.ceil((data.length + 1 + 8) / 128) * 128;
+	const targetLength = Math.ceil((data.length + 1 + 16) / 128) * 128;
 	const buffer = new Uint8Array(targetLength);
 	buffer[data.length] = 0x80;
 	buffer.set(data);
-	bigEndian.putUint32(buffer, l, targetLength - 4);
+	bigEndian.putUint64(buffer, BigInt(l), targetLength - 8);
 	for (let i = 0; i < buffer.length; i += 128) {
 		for (let t = 0; t < 16; t++) {
 			w[t] =