diff --git a/dist/index.js b/dist/index.js
index 077ee59..d9fd390 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -3,6 +3,7 @@
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
+exports.changeDpiBuffer = changeDpiBuffer;
 exports.changeDpiBlob = changeDpiBlob;
 exports.changeDpiDataUrl = changeDpiDataUrl;
 
@@ -51,6 +52,13 @@ var _H = 'H'.charCodeAt(0);
 var _Y = 'Y'.charCodeAt(0);
 var _S = 's'.charCodeAt(0);
 
+function changeDpiBuffer(buffer, dpi, format) {
+  var headerChunk = buffer.slice(0, 33);
+  var tail = buffer.slice(33);
+  var changedArray = changeDpiOnArray(headerChunk, dpi, format);
+  return Buffer.concat([changedArray, tail]);
+}
+
 function changeDpiBlob(blob, dpi) {
   // 33 bytes are ok for pngs and jpegs
   // to contain the information.
diff --git a/src/index.js b/src/index.js
index cc52a9c..9d8aa23 100644
--- a/src/index.js
+++ b/src/index.js
@@ -41,6 +41,13 @@ const _H = 'H'.charCodeAt(0);
 const _Y = 'Y'.charCodeAt(0);
 const _S = 's'.charCodeAt(0);
 
+export function changeDpiBuffer(buffer, dpi, format) {
+  const headerChunk = buffer.slice(0, 33);
+  const tail = buffer.slice(33);
+  const changedArray = changeDpiOnArray(headerChunk, dpi, format);
+  return Buffer.concat([changedArray, tail]);
+}
+
 export function changeDpiBlob(blob, dpi) {
   // 33 bytes are ok for pngs and jpegs
   // to contain the information.