diff --git a/notes/error-handling.md b/notes/error-handling.md
index 8ec4cd5..6770685 100644
--- a/notes/error-handling.md
+++ b/notes/error-handling.md
@@ -36,5 +36,6 @@ Resources:
 - [[Readwise/Monad Is Actually Easy.|This data type is a monad]]
 - Rust [`Option<T>`](https://doc.rust-lang.org/book/ch06-01-defining-an-enum.html#the-option-enum-and-its-advantages-over-null-values) and [`Result<T, E>`](https://doc.rust-lang.org/book/ch09-02-recoverable-errors-with-result.html) types.
 - Gleam [`Option(a)`](https://hexdocs.pm/gleam_stdlib/gleam/option.html) type.
+- [Typescript Monads Package](https://github.com/thames-technology/monads)
 
 ### Return touples