diff --git a/go.mod b/go.mod
index 4f0f3cb..fea1525 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module github.com/emmansun/gmsm
 go 1.14
 
 require (
-	github.com/pkg/errors v0.9.1
-	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
-	golang.org/x/sys v0.0.0-20210603125802-9665404d3644
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
+	golang.org/x/sys v0.0.0-20210910150752-751e447fb3d0
 )