diff --git a/conpty/go.mod b/conpty/go.mod
index 1a68c977..437660ee 100644
--- a/conpty/go.mod
+++ b/conpty/go.mod
@@ -4,5 +4,5 @@ go 1.18
 
 require (
 	github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86
-	golang.org/x/sys v0.20.0
+	golang.org/x/sys v0.21.0
 )
diff --git a/conpty/go.sum b/conpty/go.sum
index 9940ffe1..c0a11acd 100644
--- a/conpty/go.sum
+++ b/conpty/go.sum
@@ -1,4 +1,4 @@
 github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86 h1:JSt3B+U9iqk37QUU2Rvb6DSBYRLtWqFqfxf8l5hOZUA=
 github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86/go.mod h1:2P0UgXMEa6TsToMSuFqKFQR+fZTO9CNGUNokkPatT/0=
-golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
-golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=