diff --git a/README.md b/README.md
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@@ -561,6 +561,7 @@ _Functional Programming with Python._
 
 - [coconut](https://github.com/evhub/coconut) - A variant of Python built for simple, elegant, Pythonic functional programming.
 - [cytoolz](https://github.com/pytoolz/cytoolz/) - Cython implementation of `Toolz`: High performance functional utilities.
+- [functools](https://docs.python.org/3/library/functools.html) - (Python standard library) Higher-order functions and operations on callable objects.
 - [funcy](https://github.com/Suor/funcy) - A fancy and practical functional tools.
 - [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.