diff --git a/go.mod b/go.mod
index 7844809..56d2495 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/emmansun/sm9
 
 go 1.18
 
-require golang.org/x/sys v0.19.0
+require golang.org/x/sys v0.20.0
diff --git a/go.sum b/go.sum
index e354f1e..5d1e088 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=