diff --git a/Changelog.md b/Changelog.md
index a5878f5..953b810 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,6 +1,11 @@
 Changelog
 =========
 
+## version 3.2.1 (2021-04-03)
+
++ Fixes an undefined property error.
+
+
 ## version 3.2.0 (2021-04-03)
 
 ### Added: {docsify-ignore}
diff --git a/package.json b/package.json
index faf3f7d..8f06f67 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "audiomotion-analyzer",
   "description": "High-resolution real-time graphic audio spectrum analyzer JavaScript module with no dependencies.",
-  "version": "3.2.0",
+  "version": "3.2.1",
   "main": "./src/audioMotion-analyzer.js",
   "module": "./src/audioMotion-analyzer.js",
   "types": "./src/index.d.ts",
diff --git a/src/audioMotion-analyzer.js b/src/audioMotion-analyzer.js
index 3efcad9..36ac07c 100644
--- a/src/audioMotion-analyzer.js
+++ b/src/audioMotion-analyzer.js
@@ -2,12 +2,12 @@
  * audioMotion-analyzer
  * High-resolution real-time graphic audio spectrum analyzer JS module
  *
- * @version 3.2.0
+ * @version 3.2.1
  * @author  Henrique Avila Vianna <hvianna@gmail.com> <https://henriquevianna.com>
  * @license AGPL-3.0-or-later
  */
 
-const VERSION = '3.2.0';
+const VERSION = '3.2.1';
 
 // internal constants
 const TAU     = 2 * Math.PI,
@@ -1450,6 +1450,8 @@ export default class AudioMotionAnalyzer {
 	 */
 	_calcBars() {
 
+		const bars = this._bars = []; // initialize object property
+
 		if ( ! this._ready )
 			return;
 
@@ -1460,9 +1462,7 @@ export default class AudioMotionAnalyzer {
 			  maxFreq = this._maxFreq,
 			  minFreq = this._minFreq;
 
-		let minLog,
-			logWidth,
-			bars = [];
+		let minLog,	logWidth;
 
 		if ( ! this._isOctaveBands ) {
 		// Discrete frequencies or area fill modes
@@ -1565,9 +1565,6 @@ export default class AudioMotionAnalyzer {
 			} );
 		}
 
-		// update bars
-		this._bars = bars;
-
 		// save these for scale generation
 		this._minLog = minLog;
 		this._logWidth = logWidth;