diff --git a/readme.md b/readme.md
index 0600896..ef21892 100644
--- a/readme.md
+++ b/readme.md
@@ -16,7 +16,7 @@ All test from RFC-8439 is implemented here and is inside the ```tests``` folder.
 -----
 
 # Environment Requirements
-- x86_64 architecture
+- x86_64 or aarch64 architecture
 - little endian system
 
 If your system does not have these requirements, it might produce wrong results or might not even compile.