diff --git a/go.mod b/go.mod
index d983c825b..e62f10175 100644
--- a/go.mod
+++ b/go.mod
@@ -14,10 +14,10 @@ require (
 	k8s.io/api v0.25.4
 	k8s.io/apimachinery v0.25.4
 	k8s.io/client-go v0.25.4
-	knative.dev/eventing v0.37.3
+	knative.dev/eventing v0.37.4
 	knative.dev/hack v0.0.0-20230417170854-f591fea109b3
-	knative.dev/pkg v0.0.0-20231011201526-df28feae6d34
-	knative.dev/serving v0.37.3
+	knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f
+	knative.dev/serving v0.37.4
 )
 
 require (
@@ -105,7 +105,7 @@ require (
 	k8s.io/klog/v2 v2.80.2-0.20221028030830-9ae4992afb54 // indirect
 	k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280 // indirect
 	k8s.io/utils v0.0.0-20221108210102-8e77b1f39fe2 // indirect
-	knative.dev/networking v0.0.0-20230419144338-e5d04e805e50 // indirect
+	knative.dev/networking v0.0.0-20231012063223-0b0f2107abef // indirect
 	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
 	sigs.k8s.io/yaml v1.3.0 // indirect
diff --git a/go.sum b/go.sum
index 8f73ea3ca..03c570936 100644
--- a/go.sum
+++ b/go.sum
@@ -979,16 +979,16 @@ k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280 h1:+70TFaan3hfJzs+7VK2o+O
 k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280/go.mod h1:+Axhij7bCpeqhklhUTe3xmOn6bWxolyZEeyaFpjGtl4=
 k8s.io/utils v0.0.0-20221108210102-8e77b1f39fe2 h1:GfD9OzL11kvZN5iArC6oTS7RTj7oJOIfnislxYlqTj8=
 k8s.io/utils v0.0.0-20221108210102-8e77b1f39fe2/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
-knative.dev/eventing v0.37.3 h1:TFJS/bcWJbcY4YvGg+LNEm0qdmeaMAHdUGHKuOmnX9E=
-knative.dev/eventing v0.37.3/go.mod h1:DFZEmPkisDkr3jbTQd6mK+Dno3k9yacSgbkJGIDWg3c=
+knative.dev/eventing v0.37.4 h1:JPgz4VvYY0/YO9O+5Y4FNUhuZKNxE1Soo8zKs7JdTBU=
+knative.dev/eventing v0.37.4/go.mod h1:oGwuBilJ14D1AJyRnsVR3iujY8aw2mhhPSDFCfUaTis=
 knative.dev/hack v0.0.0-20230417170854-f591fea109b3 h1:+W4WBOq83tfGXKhtv8OB/uJeYqze3zh69GKiz1ucuqk=
 knative.dev/hack v0.0.0-20230417170854-f591fea109b3/go.mod h1:yk2OjGDsbEnQjfxdm0/HJKS2WqTLEFg/N6nUs6Rqx3Q=
-knative.dev/networking v0.0.0-20230419144338-e5d04e805e50 h1:X9rPBYr7Vrm075q0iXTr7/0oklkYoyqvlnrUwNzcUhI=
-knative.dev/networking v0.0.0-20230419144338-e5d04e805e50/go.mod h1:o2MyGpGfU5DoSAWCE2f/jnSC9GjGOplCslbA99yDkGo=
-knative.dev/pkg v0.0.0-20231011201526-df28feae6d34 h1:H+K37bEBZ2STSWMjCgrdilj38KKZGVxBbob22K99Y50=
-knative.dev/pkg v0.0.0-20231011201526-df28feae6d34/go.mod h1:ZRgzFBFmdBsARm6+Pkr9WRG8bXys8rYq64ELfLG6+9w=
-knative.dev/serving v0.37.3 h1:ebJCVLb3ZHnrJHNKDw/v5eO2Yz6F3l6lpRgAuNo4KE8=
-knative.dev/serving v0.37.3/go.mod h1:v0Xbfp7olb0Gljm5l4qNuLsIf8/2p1rIt/mphxvx1z0=
+knative.dev/networking v0.0.0-20231012063223-0b0f2107abef h1:FSEKaGc2ztb65VPn4EiTsjAFsmmHlYHUq+j+CCPlDtU=
+knative.dev/networking v0.0.0-20231012063223-0b0f2107abef/go.mod h1:rMVkShVT/14rtscYC4ZfC0hXghOXqj3EheFUDKYEqns=
+knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f h1:XCH1qZqW1riR8cjhMGjewxQXlWPrfgxeUorBjpC6lE4=
+knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f/go.mod h1:ZRgzFBFmdBsARm6+Pkr9WRG8bXys8rYq64ELfLG6+9w=
+knative.dev/serving v0.37.4 h1:EEd5hAT9GKDQXK/smngt8p4P0P8WW50WJyF09A5QT9M=
+knative.dev/serving v0.37.4/go.mod h1:zrzvt9L6RjUFcwcY4o3uSqFIEjWHc2hAPvpBenmUt6w=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/vendor/knative.dev/pkg/webhook/webhook.go b/vendor/knative.dev/pkg/webhook/webhook.go
index 779d388d2..dd6bc36e1 100644
--- a/vendor/knative.dev/pkg/webhook/webhook.go
+++ b/vendor/knative.dev/pkg/webhook/webhook.go
@@ -67,6 +67,17 @@ type Options struct {
 	// GracePeriod is how long to wait after failing readiness probes
 	// before shutting down.
 	GracePeriod time.Duration
+
+	// EnableHTTP2 enables HTTP2 for webhooks.
+	// Mitigate CVE-2023-44487 by disabling HTTP2 by default until the Go
+	// standard library and golang.org/x/net are fully fixed.
+	// Right now, it is possible for authenticated and unauthenticated users to
+	// hold open HTTP2 connections and consume huge amounts of memory.
+	// See:
+	// * https://github.com/kubernetes/kubernetes/pull/121120
+	// * https://github.com/kubernetes/kubernetes/issues/121197
+	// * https://github.com/golang/go/issues/63417#issuecomment-1758858612
+	EnableHTTP2 bool
 }
 
 // Operation is the verb being operated on
@@ -219,11 +230,18 @@ func (wh *Webhook) Run(stop <-chan struct{}) error {
 		QuietPeriod: wh.Options.GracePeriod,
 	}
 
+	// If TLSNextProto is not nil, HTTP/2 support is not enabled automatically.
+	nextProto := map[string]func(*http.Server, *tls.Conn, http.Handler){}
+	if wh.Options.EnableHTTP2 {
+		nextProto = nil
+	}
+
 	server := &http.Server{
 		Handler:           drainer,
 		Addr:              fmt.Sprint(":", wh.Options.Port),
 		TLSConfig:         wh.tlsConfig,
 		ReadHeaderTimeout: time.Minute, //https://medium.com/a-journey-with-go/go-understand-and-mitigate-slowloris-attack-711c1b1403f6
+		TLSNextProto:      nextProto,
 	}
 
 	eg, ctx := errgroup.WithContext(ctx)
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 2d3a6e043..24a51417d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -951,7 +951,7 @@ k8s.io/utils/net
 k8s.io/utils/pointer
 k8s.io/utils/strings/slices
 k8s.io/utils/trace
-# knative.dev/eventing v0.37.3
+# knative.dev/eventing v0.37.4
 ## explicit; go 1.19
 knative.dev/eventing/pkg/adapter/v2
 knative.dev/eventing/pkg/adapter/v2/test
@@ -998,12 +998,12 @@ knative.dev/eventing/pkg/observability/client
 # knative.dev/hack v0.0.0-20230417170854-f591fea109b3
 ## explicit; go 1.18
 knative.dev/hack
-# knative.dev/networking v0.0.0-20230419144338-e5d04e805e50
+# knative.dev/networking v0.0.0-20231012063223-0b0f2107abef
 ## explicit; go 1.18
 knative.dev/networking/pkg/apis/networking
 knative.dev/networking/pkg/apis/networking/v1alpha1
 knative.dev/networking/pkg/config
-# knative.dev/pkg v0.0.0-20231011201526-df28feae6d34
+# knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f
 ## explicit; go 1.18
 knative.dev/pkg/apis
 knative.dev/pkg/apis/duck
@@ -1067,7 +1067,7 @@ knative.dev/pkg/webhook/psbinding
 knative.dev/pkg/webhook/resourcesemantics
 knative.dev/pkg/webhook/resourcesemantics/defaulting
 knative.dev/pkg/webhook/resourcesemantics/validation
-# knative.dev/serving v0.37.3
+# knative.dev/serving v0.37.4
 ## explicit; go 1.18
 knative.dev/serving/pkg/apis/autoscaling
 knative.dev/serving/pkg/apis/autoscaling/v1alpha1