diff --git a/README.md b/README.md
index dd473c2b..75b87d51 100644
--- a/README.md
+++ b/README.md
@@ -563,6 +563,8 @@ _Functional Programming with Python._
 - [more-itertools](https://github.com/erikrose/more-itertools) - More routines for operating on iterables, beyond `itertools`.
 - [returns](https://github.com/dry-python/returns) - A set of type-safe monads, transformers, and composition utilities.
 - [toolz](https://github.com/pytoolz/toolz) - A collection of functional utilities for iterators, functions, and dictionaries.
+- [functools](https://docs.python.org/3/library/functools.html) - (Python standard library) Higher-order functions and operations on callable objects.
+
 
 ## GUI Development