diff --git a/go.mod b/go.mod
index 310d090..9809162 100644
--- a/go.mod
+++ b/go.mod
@@ -1,21 +1,24 @@
 module github.com/opencoff/sigtool
 
-go 1.21.1
+go 1.23.4
 
 require (
 	github.com/dchest/bcrypt_pbkdf v0.0.0-20150205184540-83f37f9c154a
-	github.com/opencoff/go-mmap v0.1.2
-	github.com/opencoff/go-utils v0.9.3
+	github.com/opencoff/go-fio v0.5.7
+	github.com/opencoff/go-mmap v0.1.5
+	github.com/opencoff/go-utils v1.0.1
 	github.com/opencoff/pflag v1.0.6-sh1
 	github.com/planetscale/vtprotobuf v0.6.0
-	golang.org/x/crypto v0.21.0
-	google.golang.org/protobuf v1.33.0
+	golang.org/x/crypto v0.31.0
+	google.golang.org/protobuf v1.36.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
-	golang.org/x/sys v0.18.0 // indirect
-	golang.org/x/term v0.18.0 // indirect
+	github.com/pkg/xattr v0.4.10 // indirect
+	github.com/puzpuzpuz/xsync/v3 v3.4.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/term v0.27.0 // indirect
 )
 
 //replace github.com/opencoff/go-mmap => ../go-mmap
diff --git a/go.sum b/go.sum
index 98b0e60..3cd7fc0 100644
--- a/go.sum
+++ b/go.sum
@@ -2,24 +2,31 @@ github.com/dchest/bcrypt_pbkdf v0.0.0-20150205184540-83f37f9c154a h1:saTgr5tMLFn
 github.com/dchest/bcrypt_pbkdf v0.0.0-20150205184540-83f37f9c154a/go.mod h1:Bw9BbhOJVNR+t0jCqx2GC6zv0TGBsShs56Y3gfSCvl0=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/opencoff/go-mmap v0.1.2 h1:2yrYleq0x9cBruDRTafs7GZt4tCYmsUlvyN77HnY9hA=
-github.com/opencoff/go-mmap v0.1.2/go.mod h1:+UjRnKQ3l5dLqSNAczz7zKI8LJ7mBhJhaSqU4S91tFs=
-github.com/opencoff/go-utils v0.9.3 h1:Gdx1uB6QZ9/8FNU4h+94xGJ+onu8bQLRE4gyKRrrDD8=
-github.com/opencoff/go-utils v0.9.3/go.mod h1:nNx572v21m3AkY9JomSXUG8iruY56Fm2zceNKNJDJaU=
+github.com/opencoff/go-fio v0.5.7 h1:0meYV1C0vCWJYmnkivCJ+0ydWmTqjWPWO/CRoAJWSMM=
+github.com/opencoff/go-fio v0.5.7/go.mod h1:iXfyUCgT/U1rr2Lz9ZIODyRpdFFJtkOlbsO6rhgfxyQ=
+github.com/opencoff/go-mmap v0.1.5 h1:RKPtevC4mOW5bi9skBPPo4nFTIH4lVWAL20Tff+FjLg=
+github.com/opencoff/go-mmap v0.1.5/go.mod h1:y/6Jk/tDUc00k3oSQpiJX++20Nw7xFSlc5kLkhGnRXw=
+github.com/opencoff/go-utils v1.0.1 h1:3Ibx2DQP+nQiany99sDVSgVvtyYaErpBrUjCRhZFnIs=
+github.com/opencoff/go-utils v1.0.1/go.mod h1:kh14Pqqe/QYGRph7ue4GWzLrlTOW8O/728qsuDFygeI=
 github.com/opencoff/pflag v1.0.6-sh1 h1:6RO8GgnpH928yu6earGDD01FnFT//bDJ1hCovcVVqY4=
 github.com/opencoff/pflag v1.0.6-sh1/go.mod h1:2bXtpAD/5h/2LarkbsRwiUxqnvB1nZBzn9Xjad1P41A=
+github.com/pkg/xattr v0.4.10 h1:Qe0mtiNFHQZ296vRgUjRCoPHPqH7VdTOrZx3g0T+pGA=
+github.com/pkg/xattr v0.4.10/go.mod h1:di8WF84zAKk8jzR1UBTEWh9AUlIZZ7M/JNt8e9B6ktU=
 github.com/planetscale/vtprotobuf v0.6.0 h1:nBeETjudeJ5ZgBHUz1fVHvbqUKnYOXNhsIEabROxmNA=
 github.com/planetscale/vtprotobuf v0.6.0/go.mod h1:t/avpk3KcrXxUnYOhZhMXJlSEyie6gQbtLq5NM3loB8=
-golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
-golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.18.0 h1:FcHjZXDMxI8mM3nwhX9HlKop4C0YQvCVCdwYl2wOtE8=
-golang.org/x/term v0.18.0/go.mod h1:ILwASektA3OnRv7amZ1xhE/KTR+u50pbXfZ03+6Nx58=
+github.com/puzpuzpuz/xsync/v3 v3.4.0 h1:DuVBAdXuGFHv8adVXjWWZ63pJq+NRXOWVXlKDBZ+mJ4=
+github.com/puzpuzpuz/xsync/v3 v3.4.0/go.mod h1:VjzYrABPabuM4KyBh1Ftq6u8nhwY5tBPKP9jpmh0nnA=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.27.0 h1:WP60Sv1nlK1T6SupCHbXzSaN0b9wUmsPoRS9b61A23Q=
+golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.36.0 h1:mjIs9gYtt56AzC4ZaffQuh88TZurBGhIJMBZGSxNerQ=
+google.golang.org/protobuf v1.36.0/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
diff --git a/sign/iomisc.go b/sign/iomisc.go
index 45ddc05..cdc1eb3 100644
--- a/sign/iomisc.go
+++ b/sign/iomisc.go
@@ -16,8 +16,8 @@ package sign
 import (
 	"encoding/binary"
 	"fmt"
+	"github.com/opencoff/go-fio"
 	"github.com/opencoff/go-mmap"
-	"github.com/opencoff/go-utils"
 	"hash"
 	"os"
 )
@@ -28,9 +28,9 @@ import (
 func writeFile(fn string, b []byte, ovwrite bool, mode uint32) error {
 	var opts uint32
 	if ovwrite {
-		opts |= utils.OPT_OVERWRITE
+		opts |= fio.OPT_OVERWRITE
 	}
-	sf, err := utils.NewSafeFile(fn, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.FileMode(mode))
+	sf, err := fio.NewSafeFile(fn, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.FileMode(mode))
 	if err != nil {
 		return err
 	}
diff --git a/src/crypt.go b/src/crypt.go
index f04b580..9de5638 100644
--- a/src/crypt.go
+++ b/src/crypt.go
@@ -20,6 +20,7 @@ import (
 	"os"
 	"strings"
 
+	"github.com/opencoff/go-fio"
 	"github.com/opencoff/go-utils"
 	flag "github.com/opencoff/pflag"
 	"github.com/opencoff/sigtool/sign"
@@ -142,9 +143,9 @@ func encrypt(args []string) {
 
 		var opts uint32
 		if force {
-			opts |= utils.OPT_OVERWRITE
+			opts |= fio.OPT_OVERWRITE
 		}
-		sf, err := utils.NewSafeFile(outfile, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, mode)
+		sf, err := fio.NewSafeFile(outfile, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, mode)
 		if err != nil {
 			Die("%s", err)
 		}
@@ -308,9 +309,9 @@ func decrypt(args []string) {
 
 		var opts uint32
 		if force {
-			opts |= utils.OPT_OVERWRITE
+			opts |= fio.OPT_OVERWRITE
 		}
-		sf, err := utils.NewSafeFile(outfile, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, mode)
+		sf, err := fio.NewSafeFile(outfile, opts, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, mode)
 		if err != nil {
 			Die("%s", err)
 		}
diff --git a/src/sign.go b/src/sign.go
index 154ff4a..f6e92b0 100644
--- a/src/sign.go
+++ b/src/sign.go
@@ -18,6 +18,7 @@ import (
 	"io"
 	"os"
 
+	"github.com/opencoff/go-fio"
 	"github.com/opencoff/go-utils"
 	flag "github.com/opencoff/pflag"
 	"github.com/opencoff/sigtool/sign"
@@ -70,9 +71,9 @@ Options:
 	if outf != "-" {
 		var opts uint32
 		if force {
-			opts |= utils.OPT_OVERWRITE
+			opts |= fio.OPT_OVERWRITE
 		}
-		sf, err := utils.NewSafeFile(outf, opts, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
+		sf, err := fio.NewSafeFile(outf, opts, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
 		if err != nil {
 			Die("can't create sig file: %s", err)
 		}