diff --git a/src/auth/pbkdf2.ts b/src/auth/pbkdf2.ts
index 5987944..e6c53ba 100644
--- a/src/auth/pbkdf2.ts
+++ b/src/auth/pbkdf2.ts
@@ -31,8 +31,8 @@ export async function pbkdf2(
   return crypto.subtle.deriveBits(
     {
       name: "PBKDF2",
-      salt: salt,
-      iterations: iterations,
+      salt: salt.buffer as ArrayBuffer,
+      iterations,
       hash: {
         name: algo,
       },
diff --git a/src/protocol/header.ts b/src/protocol/header.ts
index 20fb8b6..44c65e1 100644
--- a/src/protocol/header.ts
+++ b/src/protocol/header.ts
@@ -28,7 +28,11 @@ export function setHeader(
 }
 
 export function parseHeader(buffer: Uint8Array): MessageHeader {
-  const view = new DataView(buffer.buffer);
+  const view = new DataView(
+    buffer.buffer,
+    buffer.byteOffset,
+    buffer.byteLength,
+  );
   return {
     messageLength: view.getUint32(0, true),
     requestId: view.getUint32(4, true),
diff --git a/src/protocol/message.ts b/src/protocol/message.ts
index 38ec721..4ebe918 100644
--- a/src/protocol/message.ts
+++ b/src/protocol/message.ts
@@ -53,8 +53,13 @@ function serializeSections(
 
       view.setUint8(0, 1);
       view.setUint32(1, section1.byteLength - 1, true);
-      let pos = 4;
+      let pos = 5;
 
+      // write identifuer
+      section1.set(identifier, pos);
+      pos += identifier.byteLength;
+
+      // write documents
       for (const doc of docs) {
         section1.set(doc, pos);
         pos += doc.byteLength;
@@ -103,29 +108,29 @@ export function deserializeMessage(
   header: MessageHeader,
   buffer: Uint8Array,
 ): Message {
-  const view = new DataView(buffer.buffer);
+  const view = new DataView(
+    buffer.buffer,
+    buffer.byteOffset,
+    buffer.byteLength,
+  );
 
-  const flags = view.getInt32(0);
+  const flags = view.getInt32(0, true);
   const sections: Section[] = [];
 
   let pos = 4;
-  while (pos < view.byteLength) {
+  while (pos < buffer.byteLength) {
     const kind = view.getInt8(pos);
     pos++;
     if (kind === 0) {
       const docLen = view.getInt32(pos, true);
-      const document = deserialize(
-        new Uint8Array(view.buffer.slice(pos, pos + docLen)),
-      );
+      const document = deserialize(buffer.slice(pos, pos + docLen));
       pos += docLen;
       sections.push({ document });
     } else if (kind === 1) {
       const len = view.getInt32(pos, true);
-      const sectionBody = new Uint8Array(
-        view.buffer.slice(pos + 4, pos + len - 4),
-      );
+      const sectionBody = buffer.slice(pos + 4, pos + len);
       const identifierEndPos = sectionBody.findIndex((byte) => byte === 0);
-      const identifier = decoder.decode(buffer.slice(0, identifierEndPos));
+      const identifier = decoder.decode(sectionBody.slice(0, identifierEndPos));
       const docsBuffer = sectionBody.slice(identifierEndPos + 1);
       const documents = parseDocuments(docsBuffer);
       pos += len;
@@ -146,7 +151,11 @@ export function deserializeMessage(
 function parseDocuments(buffer: Uint8Array): Document[] {
   let pos = 0;
   const docs = [];
-  const view = new DataView(buffer.buffer);
+  const view = new DataView(
+    buffer.buffer,
+    buffer.byteOffset,
+    buffer.byteLength,
+  );
   while (pos < buffer.byteLength) {
     const docLen = view.getInt32(pos, true);
     const doc = deserialize(buffer.slice(pos, pos + docLen));
diff --git a/src/protocol/protocol.ts b/src/protocol/protocol.ts
index 51aad19..432e90d 100644
--- a/src/protocol/protocol.ts
+++ b/src/protocol/protocol.ts
@@ -150,7 +150,7 @@ export class WireProtocol {
     b: number,
   ): Promise<Uint8Array | undefined> {
     const reader = this.#conn.readable.getReader({ mode: "byob" });
-    const { value } = await reader.read(new Uint8Array(b));
+    const { value } = await reader.read(new Uint8Array(b), { min: b });
     reader.releaseLock();
     return value;
   }
diff --git a/tests/cases/03_crud.ts b/tests/cases/03_crud.ts
index 3979c6d..807b30c 100644
--- a/tests/cases/03_crud.ts
+++ b/tests/cases/03_crud.ts
@@ -1,4 +1,3 @@
-import { assertInstanceOf } from "jsr:@std/assert@^0.220.1/assert_instance_of";
 import type { Database, MongoClient, ObjectId } from "../../mod.ts";
 import {
   MongoInvalidArgumentError,
@@ -10,6 +9,7 @@ import {
   afterEach,
   assert,
   assertEquals,
+  assertInstanceOf,
   assertRejects,
   beforeEach,
   describe,
diff --git a/tests/deps.ts b/tests/deps.ts
index 77e6565..1d7fad6 100644
--- a/tests/deps.ts
+++ b/tests/deps.ts
@@ -1,6 +1,7 @@
 export {
   assert,
   assertEquals,
+  assertInstanceOf,
   assertNotEquals,
   assertRejects,
   assertThrows,