diff --git a/go.mod b/go.mod
index 6e18636..a032df8 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/markbates/pkger v0.17.1
 	github.com/stretchr/testify v1.8.4
 	github.com/urfave/cli v1.22.14
-	golang.org/x/net v0.20.0
+	golang.org/x/net v0.21.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 57a0ddf..5b3d606 100644
--- a/go.sum
+++ b/go.sum
@@ -29,8 +29,8 @@ github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcU
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/urfave/cli v1.22.14 h1:ebbhrRiGK2i4naQJr+1Xj92HXZCrK7MsyTS/ob3HnAk=
 github.com/urfave/cli v1.22.14/go.mod h1:X0eDS6pD6Exaclxm99NJ3FiCDRED7vIHpx2mDOHLvkA=
-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=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 cb955a8..2b8837b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -32,7 +32,7 @@ github.com/stretchr/testify/require
 # github.com/urfave/cli v1.22.14
 ## explicit; go 1.11
 github.com/urfave/cli
-# 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