diff --git a/go.mod b/go.mod
index e2c7fc0..0ed3bcc 100644
--- a/go.mod
+++ b/go.mod
@@ -15,5 +15,5 @@ require (
 	github.com/dlclark/regexp2 v1.10.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/net v0.20.0 // indirect
+	golang.org/x/net v0.21.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 9444965..d65140c 100644
--- a/go.sum
+++ b/go.sum
@@ -24,7 +24,7 @@ github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4 h1:0sw0nJM544SpsihWx
 github.com/yosssi/gohtml v0.0.0-20201013000340-ee4748c638f4/go.mod h1:+ccdNT0xMY1dtc5XBxumbYfOUhmduiGudqaDgD2rVRE=
 golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
 golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
-golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
-golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/vendor/golang.org/x/net/html/token.go b/vendor/golang.org/x/net/html/token.go
index de67f93..3c57880 100644
--- a/vendor/golang.org/x/net/html/token.go
+++ b/vendor/golang.org/x/net/html/token.go
@@ -910,9 +910,6 @@ func (z *Tokenizer) readTagAttrKey() {
 			return
 		}
 		switch c {
-		case ' ', '\n', '\r', '\t', '\f', '/':
-			z.pendingAttr[0].end = z.raw.end - 1
-			return
 		case '=':
 			if z.pendingAttr[0].start+1 == z.raw.end {
 				// WHATWG 13.2.5.32, if we see an equals sign before the attribute name
@@ -920,7 +917,9 @@ func (z *Tokenizer) readTagAttrKey() {
 				continue
 			}
 			fallthrough
-		case '>':
+		case ' ', '\n', '\r', '\t', '\f', '/', '>':
+			// WHATWG 13.2.5.33 Attribute name state
+			// We need to reconsume the char in the after attribute name state to support the / character
 			z.raw.end--
 			z.pendingAttr[0].end = z.raw.end
 			return
@@ -939,6 +938,11 @@ func (z *Tokenizer) readTagAttrVal() {
 	if z.err != nil {
 		return
 	}
+	if c == '/' {
+		// WHATWG 13.2.5.34 After attribute name state
+		// U+002F SOLIDUS (/) - Switch to the self-closing start tag state.
+		return
+	}
 	if c != '=' {
 		z.raw.end--
 		return
diff --git a/vendor/modules.txt b/vendor/modules.txt
index ca81ced..533fa72 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -39,7 +39,7 @@ golang.org/x/image/riff
 golang.org/x/image/vp8
 golang.org/x/image/vp8l
 golang.org/x/image/webp
-# golang.org/x/net v0.20.0
+# golang.org/x/net v0.21.0
 ## explicit; go 1.18
 golang.org/x/net/html
 golang.org/x/net/html/atom