diff --git a/README.md b/README.md
index c7952fc7..ebea8b8b 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,7 @@ Recent significant changes to the library
 
 Apr 2018:
 
+* Acorn128 authenticated cipher (finalist in the CAESAR AEAD competition).
 * Tiny and small versions of AES for reducing memory requirements.
 * Port the library to ESP8266 and ESP32.
 * Make the RNG class more robust if the app doesn't call begin() or loop().