diff --git a/CHANGELOG.md b/CHANGELOG.md
index 310a4d73..3d786897 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # @vladmandic/human  
 
-Version: **1.8.5**  
+Version: **1.9.0**  
 Description: **Human: AI-powered 3D Face Detection & Rotation Tracking, Face Description & Recognition, Body Pose Tracking, 3D Hand & Finger Tracking, Iris Analysis, Age & Gender & Emotion Prediction, Gesture Recognition**  
 
 Author: **Vladimir Mandic <mandic00@live.com>**  
@@ -9,11 +9,14 @@ Repository: **<git+https://github.com/vladmandic/human.git>**
 
 ## Changelog
 
+### **human 1.9.0 beta with breaking changes regarding caching** 2021/05/18 mandic00@live.com
+
+
+### **origin/main** 2021/05/18 mandic00@live.com
+
+
 ### **1.8.5** 2021/05/18 mandic00@live.com
 
-
-### **origin/main** 2021/05/17 mandic00@live.com
-
 - add node-video sample
 - add node-webcam demo
 - fix node build and update model signatures
diff --git a/src/config.ts b/src/config.ts
index 09513477..517241a5 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -201,7 +201,7 @@ const config: Config = {
                              // warmup pre-initializes all models for faster inference but can take
                              // significant time on startup
                              // only used for `webgl` and `humangl` backends
-  cacheSensitivity: 0.005,   // cache sensitivity
+  cacheSensitivity: 0.004,   // cache sensitivity
                              // values 0..1 where 0.01 means reset cache if input changed more than 1%
                              // set to 0 to disable caching
   filter: {                  // run input through image filters before inference
diff --git a/src/human.ts b/src/human.ts
index af04c615..95dcdc0b 100644
--- a/src/human.ts
+++ b/src/human.ts
@@ -344,7 +344,7 @@ export class Human {
   /** @hidden */
   #skipFrame = async (input) => {
     if (this.config.cacheSensitivity === 0) return true;
-    const resizeFact = 32;
+    const resizeFact = 50;
     const reduced = input.resizeBilinear([Math.trunc(input.shape[1] / resizeFact), Math.trunc(input.shape[2] / resizeFact)]);
     const sumT = this.tf.sum(reduced);
     reduced.dispose();
diff --git a/wiki b/wiki
index 3030450d..534d4d77 160000
--- a/wiki
+++ b/wiki
@@ -1 +1 @@
-Subproject commit 3030450d4a177092285d73d313a3efc7c5d8a966
+Subproject commit 534d4d77d99b0fc71913e8ef6242e4c6461614f5