diff --git a/go.mod b/go.mod
index 3681b04..5da5aa1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ncruces/zenity
 
-go 1.17
+go 1.18
 
 require (
 	github.com/dchest/jsmin v0.0.0-20220218165748-59f39799265f
@@ -8,8 +8,8 @@ require (
 	github.com/ncruces/go-strftime v0.1.8
 	github.com/randall77/makefat v0.0.0-20210315173500-7ddd0e42c844
 	go.uber.org/goleak v1.1.12 // test
-	golang.org/x/image v0.0.0-20220617043117-41969df76e82
-	golang.org/x/sys v0.0.0-20220627191245-f75cf1eec38b
+	golang.org/x/image v0.0.0-20220722155232-062f8c9fd539
+	golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664
 )
 
 require (
diff --git a/go.sum b/go.sum
index f77b678..309e732 100644
--- a/go.sum
+++ b/go.sum
@@ -24,8 +24,8 @@ go.uber.org/goleak v1.1.12 h1:gZAh5/EyT/HQwlpkCy6wTpqfH9H8Lz8zbm3dZh+OyzA=
 go.uber.org/goleak v1.1.12/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/image v0.0.0-20220617043117-41969df76e82 h1:KpZB5pUSBvrHltNEdK/tw0xlPeD13M6M6aGP32gKqiw=
-golang.org/x/image v0.0.0-20220617043117-41969df76e82/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
+golang.org/x/image v0.0.0-20220722155232-062f8c9fd539 h1:/eM0PCrQI2xd471rI+snWuu251/+/jpBpZqir2mPdnU=
+golang.org/x/image v0.0.0-20220722155232-062f8c9fd539/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 h1:VLliZ0d+/avPrXXH+OakdXhpJuEoBZuwh1m2j7U6Iug=
 golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
@@ -42,8 +42,8 @@ golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220627191245-f75cf1eec38b h1:2n253B2r0pYSmEV+UNCQoPfU/FiaizQEK5Gu4Bq4JE8=
-golang.org/x/sys v0.0.0-20220627191245-f75cf1eec38b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664 h1:v1W7bwXHsnLLloWYTVEdvGvA7BHMeBYsPcF0GLDxIRs=
+golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 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=
diff --git a/internal/zenutil/env.go b/internal/zenutil/env.go
index ecb8288..4242b67 100644
--- a/internal/zenutil/env.go
+++ b/internal/zenutil/env.go
@@ -20,9 +20,6 @@ var (
 	DateParse  = func(s string) (time.Time, error) { return time.Parse("2006-01-02", s) }
 )
 
-// Remove after 1.18.
-type any = interface{}
-
 type stringErr string
 
 func (e stringErr) Error() string { return string(e) }
diff --git a/util_unix.go b/util_unix.go
index 422bb7f..c14242f 100644
--- a/util_unix.go
+++ b/util_unix.go
@@ -96,16 +96,8 @@ func lstResult(opts options, out []byte, err error) ([]string, error) {
 func pwdResult(sep string, opts options, out []byte, err error) (string, string, error) {
 	str, err := strResult(opts, out, err)
 	if opts.username {
-		usr, pwd, _ := cut(str, sep)
+		usr, pwd, _ := strings.Cut(str, sep)
 		return usr, pwd, err
 	}
 	return "", str, err
 }
-
-// Replace with strings.Cut after 1.18.
-func cut(s, sep string) (before, after string, found bool) {
-	if i := strings.Index(s, sep); i >= 0 {
-		return s[:i], s[i+len(sep):], true
-	}
-	return s, "", false
-}
diff --git a/zenity.go b/zenity.go
index 3c3c808..d6d0aab 100644
--- a/zenity.go
+++ b/zenity.go
@@ -18,9 +18,6 @@ import (
 	"github.com/ncruces/zenity/internal/zenutil"
 )
 
-// Remove after 1.18.
-type any = interface{}
-
 func stringPtr(s string) *string { return &s }
 
 // ErrCanceled is returned when the cancel button is pressed,