diff --git a/sys/modules/opus/crypto/chacha20.lua b/sys/modules/opus/crypto/chacha20.lua
index c98654c..f5f743c 100644
--- a/sys/modules/opus/crypto/chacha20.lua
+++ b/sys/modules/opus/crypto/chacha20.lua
@@ -5,7 +5,7 @@ local cbor = require('opus.cbor')
 local sha2 = require('opus.crypto.sha2')
 local Util = require('opus.util')
 
-local ROUNDS = 8 -- Adjust this for speed tradeoff
+local ROUNDS = 20 -- Standard ChaCha20 (was 8, upgraded for security)
 
 local bxor = bit32.bxor
 local band = bit32.band