diff --git a/index.js b/index.js
index 0fe714d..3a7cc4d 100644
--- a/index.js
+++ b/index.js
@@ -25,7 +25,7 @@ module.exports = (function () {
             currFrame += 1;
 
             var attributes = bufferGeomAttributes,
-                numPoints = attributes.position.length / 3;
+                numPoints = attributes.position.count / 3;
 
             for (var i = 0; i < numPoints; ++i) {
                 tmpPos.set(
diff --git a/package.json b/package.json
index ec2c78a..1fed129 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "three-buffergeometry-sort",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Utility to sort THREE.js BufferGeometry",
   "main": "index.js",
   "repository": {
@@ -18,6 +18,6 @@
   },
   "homepage": "https://github.com/frewsxcv/three-buffergeometry-sort",
   "devDependencies": {
-      "three": "~0.71.0"
+      "three": "~0.73.0"
   }
 }