diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc7b9e5..58c048e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -99,6 +99,7 @@
 - **parameter-pane:** implement the new parameter pane ([#82](https://github.com/techlauncher-mlai-edge-physics/physics_in_the_browser/issues/82))
 - **project:** add type delcaretion for functions
 - **styles:** remove deprecated style sheets ([#53](https://github.com/techlauncher-mlai-edge-physics/physics_in_the_browser/issues/53))
+- **worker:** refactor model worker messaging system for better type safety ([#213](https://github.com/techlauncher-mlai-edge-physics/physics_in_the_browser/issues/213))
 
 ### Style
 - change occurences of Physics in the browser to CFlowSim ([#20](https://github.com/techlauncher-mlai-edge-physics/physics_in_the_browser/issues/20))