diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4023c447..d3fa7ef4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ Repository: **<git+https://github.com/vladmandic/human.git>**
 
 ## Changelog
 
+### **HEAD -> main** 2021/04/13 mandic00@live.com
+
+
 ### **1.4.3** 2021/04/12 mandic00@live.com
 
 - implement webrtc
diff --git a/src/human.ts b/src/human.ts
index 9135580c..ce3e3e7d 100644
--- a/src/human.ts
+++ b/src/human.ts
@@ -402,7 +402,7 @@ export class Human {
 
       // disable video optimization for inputs of type image
       let previousVideoOptimized;
-      if (input && this.config.videoOptimized && (input instanceof HTMLImageElement || input instanceof Image || input instanceof ImageData || input instanceof ImageBitmap || input instanceof tf.Tensor)) {
+      if (input && this.config.videoOptimized && (input instanceof HTMLImageElement || input instanceof Image || input instanceof ImageData || (typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) || input instanceof tf.Tensor)) {
         log('disabling video optimization');
         previousVideoOptimized = this.config.videoOptimized;
         this.config.videoOptimized = false;