diff --git a/README.md b/README.md
index 8f634ae..19cdf2d 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,8 @@ Secret management for NixOS. Subset replacement of agenix.
 ## Target
 + Minimal Bash Script Code Size
 
-[!WARNING]
-At early development stage, Not ready for production.
+> [!CAUTION]
+> At early development stage, Not ready for production.
 
 
 ## Compatibilities