diff --git a/README.md b/README.md
index 211ff69..71d8765 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ a C library by Peter Wuille for producing ECDSA signatures using the SECG curve
 * implements key generation
 * implements deterministic nonce generation via RFC6979
 * implements many unit tests, adding to those already present in `libsecp256k1`
+* makes no allocations (except in unit tests) for efficiency and use in freestanding implementations
 
 ![Full documentation](https://www.wpsoftware.net/rustdoc/secp256k1/)