diff --git a/go.mod b/go.mod
index df902140..86f09e96 100644
--- a/go.mod
+++ b/go.mod
@@ -13,9 +13,9 @@ require (
 	k8s.io/apimachinery v0.26.5
 	k8s.io/client-go v0.26.5
 	k8s.io/utils v0.0.0-20221108210102-8e77b1f39fe2
-	knative.dev/eventing v0.38.4
+	knative.dev/eventing v0.38.5
 	knative.dev/hack v0.0.0-20230712131415-ddae80293c43
-	knative.dev/pkg v0.0.0-20231011193800-bd99f2f98be7
+	knative.dev/pkg v0.0.0-20231023150739-56bfe0dd9626
 )
 
 require (
diff --git a/go.sum b/go.sum
index e4eed7d8..30d6c345 100644
--- a/go.sum
+++ b/go.sum
@@ -681,12 +681,12 @@ 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 v0.38.4 h1:eH059bfeLilj2xAN6V7XXOh3wqzz5ssoMS/CIJpJfmk=
-knative.dev/eventing v0.38.4/go.mod h1:ct8t+v6nmp1kFCy6ngkDWIEvnjJDNDoKptrfnQVh+z8=
+knative.dev/eventing v0.38.5 h1:NvSy3lek9IbLLWEot36NyAfNv7VkJNl38F1ItVL0D6s=
+knative.dev/eventing v0.38.5/go.mod h1:g+iAS+KBRSKULEPqoVnseMkObDeq3SJhqefbuIu8zY8=
 knative.dev/hack v0.0.0-20230712131415-ddae80293c43 h1:3SE06uNfSFGm/5XS+0trbyCUpgsOaBeyhPQU8FPNFz8=
 knative.dev/hack v0.0.0-20230712131415-ddae80293c43/go.mod h1:yk2OjGDsbEnQjfxdm0/HJKS2WqTLEFg/N6nUs6Rqx3Q=
-knative.dev/pkg v0.0.0-20231011193800-bd99f2f98be7 h1:y3qbfYX1SuSr/1ysXvKfpV8q/kCwWLWieCUgAhBUHmQ=
-knative.dev/pkg v0.0.0-20231011193800-bd99f2f98be7/go.mod h1:g+UCgSKQ2f15kHYu/V3CPtoKo5F1x/2Y1ot0NSK7gA0=
+knative.dev/pkg v0.0.0-20231023150739-56bfe0dd9626 h1:qFE+UDBRg6cpF5LbA0sv1XK4XZ36Z7aTRCa+HcuxnNQ=
+knative.dev/pkg v0.0.0-20231023150739-56bfe0dd9626/go.mod h1:g+UCgSKQ2f15kHYu/V3CPtoKo5F1x/2Y1ot0NSK7gA0=
 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 92dd01ae..26f20a71 100644
--- a/vendor/knative.dev/pkg/webhook/webhook.go
+++ b/vendor/knative.dev/pkg/webhook/webhook.go
@@ -74,6 +74,17 @@ type Options struct {
 	// ControllerOptions encapsulates options for creating a new controller,
 	// including throttling and stats behavior.
 	ControllerOptions *controller.ControllerOptions
+
+	// 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
@@ -237,12 +248,19 @@ 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{
 		ErrorLog:          log.New(&zapWrapper{logger}, "", 0),
 		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,
 	}
 
 	var serve = server.ListenAndServe
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 6df7c403..47a016e2 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -877,13 +877,13 @@ k8s.io/utils/net
 k8s.io/utils/pointer
 k8s.io/utils/strings/slices
 k8s.io/utils/trace
-# knative.dev/eventing v0.38.4
+# knative.dev/eventing v0.38.5
 ## explicit; go 1.19
 knative.dev/eventing/pkg/apis/feature
 # knative.dev/hack v0.0.0-20230712131415-ddae80293c43
 ## explicit; go 1.18
 knative.dev/hack
-# knative.dev/pkg v0.0.0-20231011193800-bd99f2f98be7
+# knative.dev/pkg v0.0.0-20231023150739-56bfe0dd9626
 ## explicit; go 1.18
 knative.dev/pkg/apis
 knative.dev/pkg/apis/duck