diff --git a/go.mod b/go.mod
index ee06482..38260c2 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module src.lwithers.me.uk/go/htpack
 
 require (
 	github.com/gogo/protobuf v1.3.2
-	golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e
+	golang.org/x/sys v0.2.0
 )
 
-go 1.13
+go 1.19
diff --git a/go.sum b/go.sum
index 4b44453..b6945f4 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,8 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e h1:CsOuNlbOuf0mzxJIefr6Q4uAUetRUwZE4qt7VfzP+xo=
-golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
diff --git a/packed/packed.pb.go b/packed/packed.pb.go
index b551cd2..f14bd1a 100644
--- a/packed/packed.pb.go
+++ b/packed/packed.pb.go
@@ -15,11 +15,15 @@
 */
 package packed
 
-import proto "github.com/gogo/protobuf/proto"
-import fmt "fmt"
-import math "math"
+import (
+	fmt "fmt"
 
-import io "io"
+	proto "github.com/gogo/protobuf/proto"
+
+	math "math"
+
+	io "io"
+)
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal