diff --git a/src/jscanify-node.js b/src/jscanify-node.js
index f8bf050..30ae041 100644
--- a/src/jscanify-node.js
+++ b/src/jscanify-node.js
@@ -140,8 +140,8 @@ class jscanify {
    * @param {*} image image to process
    * @param {*} resultWidth desired result paper width
    * @param {*} resultHeight desired result paper height
-   * @param {*} onComplete callback with `HTMLCanvasElement` passed - the unwarped paper
    * @param {*} cornerPoints optional custom corner points, in case automatic corner points are incorrect
+   * @returns `HTMLCanvasElement` containing undistorted image
    */
   extractPaper(image, resultWidth, resultHeight, cornerPoints) {
     const canvas = createCanvas();
diff --git a/src/jscanify.js b/src/jscanify.js
index 463369e..2dfd14e 100644
--- a/src/jscanify.js
+++ b/src/jscanify.js
@@ -131,8 +131,8 @@
      * @param {*} image image to process
      * @param {*} resultWidth desired result paper width
      * @param {*} resultHeight desired result paper height
-     * @param {*} onComplete callback with `HTMLCanvasElement` passed - the unwarped paper
      * @param {*} cornerPoints optional custom corner points, in case automatic corner points are incorrect
+     * @returns `HTMLCanvasElement` containing undistorted image
      */
     extractPaper(image, resultWidth, resultHeight, cornerPoints) {
       const canvas = document.createElement("canvas");