diff --git a/pkg/go.mod b/pkg/go.mod
index b8a8f6c..d552102 100644
--- a/pkg/go.mod
+++ b/pkg/go.mod
@@ -1,7 +1,7 @@
 module src.lwithers.me.uk/go/rsa/pkg
 
-go 1.20
+go 1.22
 
 require src.lwithers.me.uk/go/writefile v1.0.1
 
-require golang.org/x/sys v0.5.0 // indirect
+require golang.org/x/sys v0.19.0 // indirect
diff --git a/pkg/go.sum b/pkg/go.sum
index fe0b93d..706509d 100644
--- a/pkg/go.sum
+++ b/pkg/go.sum
@@ -1,6 +1,5 @@
-golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8 h1:JA8d3MPx/IToSyXZG/RhwYEtfrKO1Fxrqe8KrkiLXKM=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 src.lwithers.me.uk/go/writefile v1.0.1 h1:bwBGtvyZfCxFIM14e1aYgJWlZuowKkwJx53OJlUPd0s=
 src.lwithers.me.uk/go/writefile v1.0.1/go.mod h1:NahlmRCtB7kg4ai+zHZgxXdUs+MR8VqWG8mql35TsxA=