diff --git a/lib/index.d.ts b/lib/index.d.ts
index e756884c4..8d38e59ad 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -658,7 +658,7 @@ declare namespace sharp {
          * @param callback Callback function called on completion with three arguments (err, buffer, info).
          * @returns A sharp instance that can be used to chain operations
          */
-        toBuffer(callback: (err: Error, buffer: Buffer, info: OutputInfo) => void): Sharp;
+        toBuffer(callback: (err: Error, buffer: Buffer<ArrayBuffer>, info: OutputInfo) => void): Sharp;
 
         /**
          * Write output to a Buffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and RAW output are supported.
@@ -667,7 +667,7 @@ declare namespace sharp {
          * @param options.resolveWithObject Resolve the Promise with an Object containing data and info properties instead of resolving only with data.
          * @returns A promise that resolves with the Buffer data.
          */
-        toBuffer(options?: { resolveWithObject: false }): Promise<Buffer>;
+        toBuffer(options?: { resolveWithObject: false }): Promise<Buffer<ArrayBuffer>>;
 
         /**
          * Write output to a Buffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and RAW output are supported.
@@ -676,7 +676,7 @@ declare namespace sharp {
          * @param options.resolveWithObject Resolve the Promise with an Object containing data and info properties instead of resolving only with data.
          * @returns A promise that resolves with an object containing the Buffer data and an info object containing the output image format, size (bytes), width, height and channels
          */
-        toBuffer(options: { resolveWithObject: true }): Promise<{ data: Buffer; info: OutputInfo }>;
+        toBuffer(options: { resolveWithObject: true }): Promise<{ data: Buffer<ArrayBuffer>; info: OutputInfo }>;
 
         /**
          * Write output to a Uint8Array backed by a transferable ArrayBuffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and RAW output are supported.
diff --git a/package.json b/package.json
index a62c6b67e..98b261a33 100644
--- a/package.json
+++ b/package.json
@@ -189,6 +189,11 @@
     "@img/sharp-win32-ia32": "0.35.3-rc.0",
     "@img/sharp-win32-x64": "0.35.3-rc.0"
   },
+  "peerDependenciesMeta": {
+    "@types/node": {
+      "optional": true
+    }
+  },
   "devDependencies": {
     "@biomejs/biome": "^2.5.1",
     "@cpplint/cli": "^0.1.0",