diff --git a/README.md b/README.md
index 301d1f5a2..97e7ba4c0 100644
--- a/README.md
+++ b/README.md
@@ -346,7 +346,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 ## Containers
 
 * [C++ B-tree](https://github.com/algorithm-ninja/cpp-btree) - A template library that implements ordered in-memory containers based on a B-tree data structure. [Apache2]
-* [dynamic_bitset](https://github.com/pinam45/dynamic_bitset) - A C++17 header-only dynamic bitset. [MIT]
+* [dynamic_bitset](https://github.com/pinam45/dynamic_bitset) - Simple Useful Libraries: C++17/20 header-only dynamic bitset. [MIT] [website](https://pinam45.github.io/dynamic_bitset/)
 * [fixed-containers](https://github.com/teslamotors/fixed-containers) - Header-only C++20 library that provides fixed capacity constexpr containers. [MIT]
 * [flat_hash_map](https://github.com/skarupke/flat_hash_map) - A very fast flat hashtable with Fibonacci hashing.
 * [frozen](https://github.com/serge-sans-paille/frozen) - a header-only, constexpr alternative to gperf for C++14 users. [Apache-2.0]
@@ -1151,6 +1151,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [emio](https://github.com/Viatorus/emio) - A safe and fast high-level and low-level character input/output library. [MIT]
 * [faker-cxx](https://github.com/cieslarmichal/faker-cxx) - C++20 Faker library for generating fake (but realistic) data for testing and development. [MIT]
 * [FastFormat](http://www.fastformat.org) - Fast, Safe C++ Formatting inspired by log4j and Pantheios. [Simplified BSD]
+* [fast_io](https://github.com/cppfastio/fast_io) - Significantly faster input/output for C++20. [MIT]
 * [fccf](https://github.com/p-ranav/fccf) - A command-line tool that recursively searches a directory to find C/C++ source code matching a search string. [MIT]
 * [{fmt}](https://github.com/fmtlib/fmt) :zap: - Small, safe and fast formatting library for C++. [Simplified BSD] [website](https://fmt.dev)
 * [gcc-poison](https://github.com/leafsr/gcc-poison) - A simple header file for developers to ban unsafe C/C++ functions from applications.