diff --git a/website-1.x/blog/2019-12-30-docusaurus-2019-recap.md b/website-1.x/blog/2019-12-30-docusaurus-2019-recap.md
index 4065493686..28c6413fc9 100644
--- a/website-1.x/blog/2019-12-30-docusaurus-2019-recap.md
+++ b/website-1.x/blog/2019-12-30-docusaurus-2019-recap.md
@@ -41,6 +41,7 @@ And welcomed more projects to Docusaurus 1:
 
 - [Libra](https://developers.libra.org/)
 - [MobX](https://mobx.js.org/)
+- [Immer](https://immerjs.github.io/immer/)
 - [Sorbet](https://sorbet.org/)
 
 ## Media