diff --git a/article/git/git.md b/article/git/git.md
index 4902cac..104a16a 100644
--- a/article/git/git.md
+++ b/article/git/git.md
@@ -8,7 +8,7 @@
 
 ```bash
 ssh-keygen -t rsa -f ~/.ssh/id_rsa_your_custom_name -C "your email"
-ssh-keygen -t ed25519 -C "xxxx"
+ssh-keygen -t ed25519 -C "xxxx" -b 4096
 ```
 
 添加密钥