diff --git a/go.mod b/go.mod
index 36de3fc..a9bf576 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module github.com/emmansun/gmsm
 go 1.18
 
 require (
-	golang.org/x/crypto v0.20.0
+	golang.org/x/crypto v0.21.0
 	golang.org/x/sys v0.18.0
 )
diff --git a/go.sum b/go.sum
index f52f8cf..137e277 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-golang.org/x/crypto v0.20.0 h1:jmAMJJZXr5KiCw05dfYK9QnqaqKLYXijU23lsEdcQqg=
-golang.org/x/crypto v0.20.0/go.mod h1:Xwo95rrVNIoSMx9wa1JroENMToLWn3RNVrTBpLHgZPQ=
+golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
+golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
 golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
 golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=