3 files changed, 13 insertions, 7 deletions
diff --git a/lib/index.d.ts b/lib/index.d.ts
index c73eeb5..705606f 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -1,7 +1,10 @@
 interface Mammoth {
     convertToHtml: (input: Input, options?: Options) => Promise<Result>;
     extractRawText: (input: Input) => Promise<Result>;
-    embedStyleMap: (input: Input, styleMap: string) => Promise<{toBuffer: () => Buffer}>;
+    embedStyleMap: (input: Input, styleMap: string) => Promise<{
+        toArrayBuffer: () => ArrayBuffer,
+        toBuffer: () => Buffer,
+    }>;
     images: Images;
 }
 
diff --git a/lib/index.js b/lib/index.js
index ac9f634..03302c2 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -92,12 +92,15 @@ function embedStyleMap(input, styleMap) {
             return docxStyleMap.writeStyleMap(docxFile, styleMap);
         })
         .then(function(docxFile) {
-            return docxFile.toBuffer();
+            return docxFile.toArrayBuffer();
         })
-        .then(function(buffer) {
+        .then(function(arrayBuffer) {
             return {
+                toArrayBuffer: function() {
+                    return arrayBuffer;
+                },
                 toBuffer: function() {
-                    return buffer;
+                    return Buffer.from(arrayBuffer);
                 }
             };
         });
diff --git a/lib/zipfile.js b/lib/zipfile.js
index 85dde81..2129193 100644
--- a/lib/zipfile.js
+++ b/lib/zipfile.js
@@ -28,15 +28,15 @@ function openArrayBuffer(arrayBuffer) {
             zipFile.file(name, contents);
         }
 
-        function toBuffer() {
-            return zipFile.generateAsync({type: "nodebuffer"});
+        function toArrayBuffer() {
+            return zipFile.generateAsync({type: "arraybuffer"});
         }
 
         return {
             exists: exists,
             read: read,
             write: write,
-            toBuffer: toBuffer
+            toArrayBuffer: toArrayBuffer
         };
     });
 }