diff --git a/cmd/cmd-close.go b/cmd/cmd-close.go
index e35a20a..0157253 100644
--- a/cmd/cmd-close.go
+++ b/cmd/cmd-close.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"os"
 	"strings"
 
@@ -81,7 +82,7 @@ var (
 					if !confirmed {
 						return nil
 					}
-				} else if !os.IsNotExist(err) {
+				} else if !errors.Is(err, fs.ErrNotExist) {
 					return fmt.Errorf("failed to access output file: %w", err)
 				}
 			}
diff --git a/cmd/cmd-open.go b/cmd/cmd-open.go
index 4fdadc0..650173e 100644
--- a/cmd/cmd-open.go
+++ b/cmd/cmd-open.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"os"
 	"strings"
 
@@ -70,7 +71,7 @@ var (
 					if !confirmed {
 						return nil
 					}
-				} else if !os.IsNotExist(err) {
+				} else if !errors.Is(err, fs.ErrNotExist) {
 					return fmt.Errorf("failed to access output file: %w", err)
 				}
 			}
diff --git a/filesig/helpers.go b/filesig/helpers.go
index 90e7918..0c05e59 100644
--- a/filesig/helpers.go
+++ b/filesig/helpers.go
@@ -3,6 +3,7 @@ package filesig
 import (
 	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"strings"
 
@@ -59,7 +60,7 @@ func SignFile(dataFilePath, signatureFilePath string, metaData map[string]string
 		if err != nil {
 			return nil, fmt.Errorf("failed to add signature to file: %w", err)
 		}
-	case os.IsNotExist(err):
+	case errors.Is(err, fs.ErrNotExist):
 		// Make signature section for saving to disk.
 		newSigFileData, err = MakeSigFileSection(signature)
 		if err != nil {
diff --git a/go.mod b/go.mod
index 7f5def3..0ef93fe 100644
--- a/go.mod
+++ b/go.mod
@@ -5,19 +5,12 @@ go 1.15
 require (
 	github.com/AlecAivazis/survey/v2 v2.3.6
 	github.com/aead/ecdh v0.2.0
-	github.com/danieljoos/wincred v1.1.2 // indirect
-	github.com/godbus/dbus/v5 v5.1.0 // indirect
-	github.com/gofrs/uuid v4.3.0+incompatible // indirect
-	github.com/inconshreveable/mousetrap v1.0.1 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
 	github.com/mr-tron/base58 v1.2.0
-	github.com/safing/portbase v0.15.2
+	github.com/safing/portbase v0.16.2
 	github.com/satori/go.uuid v1.2.0
 	github.com/spf13/cobra v1.5.0
 	github.com/tevino/abool v1.2.0
 	github.com/zalando/go-keyring v0.2.1
-	golang.org/x/crypto v0.0.0-20220926161630-eccd6366d1be
-	golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec // indirect
-	golang.org/x/term v0.0.0-20220919170432-7a66f970e087 // indirect
+	golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2
+	golang.org/x/sys v0.0.0-20221010170243-090e33056c14 // indirect
 )
diff --git a/go.sum b/go.sum
index 3f5eb73..3ab8e40 100644
--- a/go.sum
+++ b/go.sum
@@ -93,8 +93,10 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/safing/portbase v0.15.2 h1:/FC9CQe+2Nvtrh3aoeWvSmYRO+ofMWwkiCnIhee5IH4=
+github.com/safing/jess v0.3.0/go.mod h1:JbYsPk5iJZx0OXDZeMcjS9qEdkGVUg+DCA8Fw2LdN9s=
 github.com/safing/portbase v0.15.2/go.mod h1:5bHi99fz7Hh/wOsZUOI631WF9ePSHk57c4fdlOMS91Y=
+github.com/safing/portbase v0.16.2 h1:ZlCZBZkKmgJDR+sHSRbFc9mM8m9qYtu8agE1xCirvQU=
+github.com/safing/portbase v0.16.2/go.mod h1:mzNCWqPbO7vIYbbK5PElGbudwd2vx4YPNawymL8Aro8=
 github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/seehuhn/fortuna v1.0.1/go.mod h1:LX8ubejCnUoT/hX+1aKUtbKls2H6DRkqzkc7TdR3iis=
@@ -131,8 +133,10 @@ github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JT
 github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
 github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
 github.com/tklauser/go-sysconf v0.3.9/go.mod h1:11DU/5sG7UexIrp/O6g35hrWzu0JxlwQ3LSFUzyeuhs=
+github.com/tklauser/go-sysconf v0.3.10/go.mod h1:C8XykCvCb+Gn0oNCWPIlcb0RuglQTYaQ2hGm7jmxEFk=
 github.com/tklauser/numcpus v0.3.0/go.mod h1:yFGUr7TUHQRAhyqBcEg0Ge34zDBAsIvJJcyE6boqnA8=
 github.com/tklauser/numcpus v0.4.0/go.mod h1:1+UI3pD8NW14VMwdgJNJ1ESk2UnwhAnz5hMwiKKqXCQ=
+github.com/tklauser/numcpus v0.5.0/go.mod h1:OGzpTxpcIMNGYQdit2BYL1pvk/dSOaJWjKoflh+RQjo=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/valyala/fastrand v1.1.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
 github.com/valyala/histogram v1.2.0/go.mod h1:Hb4kBwb4UxsaNbbbh+RRz8ZR6pdodR57tzWUS3BUzXY=
@@ -150,12 +154,15 @@ go.etcd.io/bbolt v1.3.6/go.mod h1:qXsaaIqmgQH0T+OPdb99Bf+PKfBBQVAdyD6TY9G8XM4=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20220926161630-eccd6366d1be h1:fmw3UbQh+nxngCAHrDCCztao/kbYFnWjoqop8dHx05A=
 golang.org/x/crypto v0.0.0-20220926161630-eccd6366d1be/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2 h1:x8vtB3zMecnlqZIwJNUUpwYKYSqCz5jXbiyv0ZJJZeI=
+golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.0.0-20220927171203-f486391704dc/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220923202941-7f9b1623fab7/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -172,9 +179,12 @@ golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220422013727-9388b58f7150/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220503163025-988cb79eb6c6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec h1:BkDtF2Ih9xZ7le9ndzTA7KJow28VbQW3odyk/8drmuI=
 golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20221010170243-090e33056c14 h1:k5II8e6QD8mITdi+okbbmR/cIyEbeXLBhy5Ha4nevyc=
+golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210503060354-a79de5458b56/go.mod h1:tfny5GFUkzUvx4ps4ajbZsCe5lw1metzhBm9T3x7oIY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -191,6 +201,7 @@ golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8T
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/truststores/dir.go b/truststores/dir.go
index 25484f0..8ae1612 100644
--- a/truststores/dir.go
+++ b/truststores/dir.go
@@ -3,6 +3,7 @@ package truststores
 import (
 	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"strings"
@@ -246,7 +247,7 @@ func NewDirTrustStore(storageDir string) (*DirTrustStore, error) {
 	// validate path
 	info, err := os.Stat(cleanedPath)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			return nil, fmt.Errorf("trust store does not exist: %w", err)
 		}
 		return nil, fmt.Errorf("failed to access trust store: %w", err)
diff --git a/truststores/io.go b/truststores/io.go
index 8ccff5e..cb34844 100644
--- a/truststores/io.go
+++ b/truststores/io.go
@@ -2,6 +2,7 @@ package truststores
 
 import (
 	"errors"
+	"io/fs"
 	"os"
 
 	"github.com/safing/jess"
@@ -38,7 +39,7 @@ func WriteSignetToFile(signet *jess.Signet, filename string) error {
 func LoadSignetFromFile(filename string) (*jess.Signet, error) {
 	data, err := os.ReadFile(filename)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			return nil, jess.ErrSignetNotFound
 		}
 		return nil, err
@@ -83,7 +84,7 @@ func WriteEnvelopeToFile(envelope *jess.Envelope, filename string) error {
 func LoadEnvelopeFromFile(filename string) (*jess.Envelope, error) {
 	data, err := os.ReadFile(filename)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			return nil, jess.ErrEnvelopeNotFound
 		}
 		return nil, err