diff --git a/go.mod b/go.mod
index debf1c0..bedc6ff 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/tailscale/peercred
 
-go 1.18
+go 1.24.1
 
-require golang.org/x/sys v0.29.1-0.20250107080300-1c14dcadc3ab
+require golang.org/x/sys v0.31.0
diff --git a/go.sum b/go.sum
index 2bfc1a9..8b5c0ea 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
 golang.org/x/sys v0.29.1-0.20250107080300-1c14dcadc3ab h1:BMkEEWYOjkvOX7+YKOGbp6jCyQ5pR2j0Ah47p1Vdsx4=
 golang.org/x/sys v0.29.1-0.20250107080300-1c14dcadc3ab/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
+golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=