diff --git a/My_server/Cargo.toml b/My_server/Cargo.toml
index fb9d442..6a82903 100644
--- a/My_server/Cargo.toml
+++ b/My_server/Cargo.toml
@@ -198,7 +198,7 @@ cbc = "0.1"
 
 # 国密 SM2/SM3/SM4 (Phase 0: 安全合规)
 sm3 = "0.4"
-sm4 = "0.5"
+sm4 = "0.6"
 smcrypto = "0.2"
 
 # 模板引擎