diff --git a/README.md b/README.md
index 1c1aa00..819653a 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,9 @@ Encrypt config `~/.tinyencrypt/config-rs.json`:
 
 ```json
 {
+  "environment": {
+    "TINY_ENCRYPT_DEFAULT_ALGORITHM": "AES or CHACHA20"
+  },
   "envelops": [
     {
       "type": "pgp-rsa",