diff --git a/go.mod b/go.mod
index 12611f35f..7077b4399 100644
--- a/go.mod
+++ b/go.mod
@@ -21,11 +21,11 @@ require (
 	k8s.io/cli-runtime v0.19.7
 	k8s.io/client-go v0.19.7
 	k8s.io/code-generator v0.19.7
-	knative.dev/eventing v0.22.1-0.20210512205148-1bbc0130b53a
+	knative.dev/eventing v0.22.1-0.20210517121124-200e54c6ce48
 	knative.dev/hack v0.0.0-20210428122153-93ad9129c268
 	knative.dev/networking v0.0.0-20210512050647-ace2d3306f0b
 	knative.dev/pkg v0.0.0-20210510175900-4564797bf3b7
-	knative.dev/serving v0.22.1-0.20210513113048-93847553c9e4
+	knative.dev/serving v0.22.1-0.20210517132031-a67cc87bdc32
 	sigs.k8s.io/yaml v1.2.0
 )
 
diff --git a/go.sum b/go.sum
index d3eec195c..91e19fbb5 100644
--- a/go.sum
+++ b/go.sum
@@ -1284,19 +1284,18 @@ k8s.io/utils v0.0.0-20200729134348-d5654de09c73/go.mod h1:jPW/WVKK9YHAvNhRxK0md/
 k8s.io/utils v0.0.0-20210111153108-fddb29f9d009 h1:0T5IaWHO3sJTEmCP6mUlBvMukxPKUQWqiI/YuiBNMiQ=
 k8s.io/utils v0.0.0-20210111153108-fddb29f9d009/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 knative.dev/caching v0.0.0-20210512050647-922782660f7c/go.mod h1:d+fIY/LkAZAM6HsRJwmfirNDMCc1+hqGlQctLP1CmzE=
-knative.dev/eventing v0.22.1-0.20210512205148-1bbc0130b53a h1:dafIIUwdttDhhoPIvOp4sffzCJ42YCFbZ25DzQgTUaE=
-knative.dev/eventing v0.22.1-0.20210512205148-1bbc0130b53a/go.mod h1:xehVLff2eqwBxQPxBVmgiHzJadzldQulBxRdYMljRAs=
+knative.dev/eventing v0.22.1-0.20210517121124-200e54c6ce48 h1:8daV4Vf1SQjHJqbQIHRzZnUNekCzc6zomAPQENj4WpY=
+knative.dev/eventing v0.22.1-0.20210517121124-200e54c6ce48/go.mod h1:vGob3H6BTseZP+/dA5ze89gM+iNHlB2Cez8FFI7A9KM=
 knative.dev/hack v0.0.0-20210428122153-93ad9129c268 h1:lBIj9Epd9UQ55NEaHzAdY/UZbuaegCdGPKVC2+Z68Q0=
 knative.dev/hack v0.0.0-20210428122153-93ad9129c268/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
 knative.dev/hack/schema v0.0.0-20210428122153-93ad9129c268/go.mod h1:ffjwmdcrH5vN3mPhO8RrF2KfNnbHeCE2C60A+2cv3U0=
 knative.dev/networking v0.0.0-20210512050647-ace2d3306f0b h1:Ea6ym1Jfd/Hci1EGj+uPaE3d6SS1s/Br+6fFAWdJCeM=
 knative.dev/networking v0.0.0-20210512050647-ace2d3306f0b/go.mod h1:y7RmP2/dHO/DAC1QmpUtgTVF6/Z8whaL+wjgey+HthU=
-knative.dev/pkg v0.0.0-20210428141353-878c85083565/go.mod h1:fIl4l4OmZodkElyaHoT0LCF5wT+3+P/kinawQ4XlLtE=
 knative.dev/pkg v0.0.0-20210510175900-4564797bf3b7 h1:i4P8emOPrLctmbaPHp5eRIOqz+XTOkit7KgZeS+onKs=
 knative.dev/pkg v0.0.0-20210510175900-4564797bf3b7/go.mod h1:fIl4l4OmZodkElyaHoT0LCF5wT+3+P/kinawQ4XlLtE=
-knative.dev/reconciler-test v0.0.0-20210506205310-ed3c37806817/go.mod h1:pUozU+xgCWG9eH+4bYBXM0zWPl8lwvan34gCi/ZDP8o=
-knative.dev/serving v0.22.1-0.20210513113048-93847553c9e4 h1:5n2ztgAWpcBdEt1HVwbrPSMSHHH520xRJn8ZxtALg4E=
-knative.dev/serving v0.22.1-0.20210513113048-93847553c9e4/go.mod h1:hoGG2F9/qfAL/x0x14hAdciD7YxjdsaDqZ0PRNmj1gs=
+knative.dev/reconciler-test v0.0.0-20210512062647-d5adf72546be/go.mod h1:ZHvzjwe5aUnWDx+u5y9EPaZ++5PM9Yapp/IvBDiS+Yk=
+knative.dev/serving v0.22.1-0.20210517132031-a67cc87bdc32 h1:8sJ9ZgeeBcQlX3AXLn/bHSURcHatogcOUZpgoblXGRU=
+knative.dev/serving v0.22.1-0.20210517132031-a67cc87bdc32/go.mod h1:hoGG2F9/qfAL/x0x14hAdciD7YxjdsaDqZ0PRNmj1gs=
 modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
 modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
 modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
diff --git a/vendor/knative.dev/serving/pkg/apis/serving/register.go b/vendor/knative.dev/serving/pkg/apis/serving/register.go
index edc35b896..61a2e8b4a 100644
--- a/vendor/knative.dev/serving/pkg/apis/serving/register.go
+++ b/vendor/knative.dev/serving/pkg/apis/serving/register.go
@@ -89,9 +89,11 @@ const (
 	// which Service they are created.
 	ServiceLabelKey = GroupName + "/service"
 
-	// DomainMappingLabelKey is the label key attached to Ingress resources to indicate
+	// DomainMappingUIDLabelKey is the label key attached to Ingress resources to indicate
 	// which DomainMapping triggered their creation.
-	DomainMappingLabelKey = GroupName + "/domainMapping"
+	// This uses a uid rather than a name because domain mapping names can exceed
+	// a label's 63 character limit.
+	DomainMappingUIDLabelKey = GroupName + "/domainMappingUID"
 
 	// DomainMappingNamespaceLabelKey is the label key attached to Ingress
 	// resources created by a DomainMapping to indicate which namespace the
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d82ef8227..6c09c79d1 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -766,7 +766,7 @@ k8s.io/kube-openapi/pkg/util/sets
 k8s.io/utils/buffer
 k8s.io/utils/integer
 k8s.io/utils/trace
-# knative.dev/eventing v0.22.1-0.20210512205148-1bbc0130b53a
+# knative.dev/eventing v0.22.1-0.20210517121124-200e54c6ce48
 ## explicit
 knative.dev/eventing/pkg/apis/config
 knative.dev/eventing/pkg/apis/duck
@@ -842,7 +842,7 @@ knative.dev/pkg/tracing/config
 knative.dev/pkg/tracing/propagation
 knative.dev/pkg/tracing/propagation/tracecontextb3
 knative.dev/pkg/tracker
-# knative.dev/serving v0.22.1-0.20210513113048-93847553c9e4
+# knative.dev/serving v0.22.1-0.20210517132031-a67cc87bdc32
 ## explicit
 knative.dev/serving/pkg/apis/autoscaling
 knative.dev/serving/pkg/apis/autoscaling/v1alpha1