diff --git a/go.mod b/go.mod
index 367b6d36b..f8d7057ef 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	k8s.io/apimachinery v0.20.7
 	k8s.io/client-go v0.20.7
 	k8s.io/code-generator v0.20.7
-	knative.dev/eventing v0.24.0
+	knative.dev/eventing v0.24.2
 	knative.dev/hack v0.0.0-20210622141627-e28525d8d260
-	knative.dev/pkg v0.0.0-20210622173328-dd0db4b05c80
+	knative.dev/pkg v0.0.0-20210902173607-953af0138c75
 )
diff --git a/go.sum b/go.sum
index d40bb8b51..318d4128b 100644
--- a/go.sum
+++ b/go.sum
@@ -1133,13 +1133,14 @@ k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd h1:sOHNzJIkytDF6qadMNKhhD
 k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
 k8s.io/utils v0.0.0-20201110183641-67b214c5f920 h1:CbnUZsM497iRC5QMVkHwyl8s2tB3g7yaSHkYPkpgelw=
 k8s.io/utils v0.0.0-20201110183641-67b214c5f920/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
-knative.dev/eventing v0.24.0 h1:CoaQwZBizxZyOFJUvFcyb7vYSvpYBmfb4IYRNWUdTPE=
-knative.dev/eventing v0.24.0/go.mod h1:9xo0SWkIfpXrx0lvGQO7MUlPF8cu+QCMd2gGxj6wxrU=
+knative.dev/eventing v0.24.2 h1:yW3pOUKm/PixfH/lGsDVX9UdHahR2uzMoewV4PkRbK8=
+knative.dev/eventing v0.24.2/go.mod h1:9xo0SWkIfpXrx0lvGQO7MUlPF8cu+QCMd2gGxj6wxrU=
 knative.dev/hack v0.0.0-20210622141627-e28525d8d260 h1:f2eMtOubAOc/Q7JlvFPDKXiPlJVK+VpX2Cot8hRzCgQ=
 knative.dev/hack v0.0.0-20210622141627-e28525d8d260/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
 knative.dev/hack/schema v0.0.0-20210622141627-e28525d8d260/go.mod h1:ffjwmdcrH5vN3mPhO8RrF2KfNnbHeCE2C60A+2cv3U0=
-knative.dev/pkg v0.0.0-20210622173328-dd0db4b05c80 h1:GHJ3lglE0/YHfBMMJqluqUNLOmsNXh7s7DBnfrkpRMM=
 knative.dev/pkg v0.0.0-20210622173328-dd0db4b05c80/go.mod h1:kGegTnbZ+ljFjAE3E1+8wgaH2LMv8qYi+72o3F3cbdc=
+knative.dev/pkg v0.0.0-20210902173607-953af0138c75 h1:U9Im5Wp0oKV2ZWP+V9RZSDgRqv4IhfnzObMrgzWdDRQ=
+knative.dev/pkg v0.0.0-20210902173607-953af0138c75/go.mod h1:kGegTnbZ+ljFjAE3E1+8wgaH2LMv8qYi+72o3F3cbdc=
 knative.dev/reconciler-test v0.0.0-20210623134345-88c84739abd9/go.mod h1:4wqv2WyWUC5yhTesRUVwgjv/fHTHny1RYBfdB6tVDok=
 pgregory.net/rapid v0.3.3 h1:jCjBsY4ln4Atz78QoBWxUEvAHaFyNDQg9+WU62aCn1U=
 pgregory.net/rapid v0.3.3/go.mod h1:UYpPVyjFHzYBGHIxLFoupi8vwk6rXNzRY9OMvVxFIOU=
diff --git a/vendor/knative.dev/eventing/pkg/apis/sources/v1/ping_validation.go b/vendor/knative.dev/eventing/pkg/apis/sources/v1/ping_validation.go
index d86489747..c60f49a4f 100644
--- a/vendor/knative.dev/eventing/pkg/apis/sources/v1/ping_validation.go
+++ b/vendor/knative.dev/eventing/pkg/apis/sources/v1/ping_validation.go
@@ -20,6 +20,7 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"strings"
 
@@ -37,8 +38,10 @@ func (c *PingSource) Validate(ctx context.Context) *apis.FieldError {
 
 func (cs *PingSourceSpec) Validate(ctx context.Context) *apis.FieldError {
 	var errs *apis.FieldError
-
 	schedule := cs.Schedule
+
+	errs = validateDescriptor(schedule)
+
 	if cs.Timezone != "" {
 		schedule = "CRON_TZ=" + cs.Timezone + " " + schedule
 	}
@@ -98,3 +101,10 @@ func validateJSON(str string) error {
 	var objmap map[string]interface{}
 	return json.Unmarshal([]byte(str), &objmap)
 }
+
+func validateDescriptor(spec string) *apis.FieldError {
+	if strings.Contains(spec, "@every") {
+		return apis.ErrInvalidValue(errors.New("unsupported descriptor @every"), "schedule")
+	}
+	return nil
+}
diff --git a/vendor/knative.dev/eventing/pkg/apis/sources/v1beta2/ping_validation.go b/vendor/knative.dev/eventing/pkg/apis/sources/v1beta2/ping_validation.go
index 5bbd2d7f0..c8fa47a60 100644
--- a/vendor/knative.dev/eventing/pkg/apis/sources/v1beta2/ping_validation.go
+++ b/vendor/knative.dev/eventing/pkg/apis/sources/v1beta2/ping_validation.go
@@ -20,6 +20,7 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"strings"
 
@@ -37,8 +38,10 @@ func (c *PingSource) Validate(ctx context.Context) *apis.FieldError {
 
 func (cs *PingSourceSpec) Validate(ctx context.Context) *apis.FieldError {
 	var errs *apis.FieldError
-
 	schedule := cs.Schedule
+
+	errs = validateDescriptor(schedule)
+
 	if cs.Timezone != "" {
 		schedule = "CRON_TZ=" + cs.Timezone + " " + schedule
 	}
@@ -98,3 +101,10 @@ func validateJSON(str string) error {
 	var objmap map[string]interface{}
 	return json.Unmarshal([]byte(str), &objmap)
 }
+
+func validateDescriptor(spec string) *apis.FieldError {
+	if strings.Contains(spec, "@every") {
+		return apis.ErrInvalidValue(errors.New("unsupported descriptor @every"), "schedule")
+	}
+	return nil
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d9fed7f07..a587ddd86 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -869,7 +869,7 @@ k8s.io/utils/buffer
 k8s.io/utils/integer
 k8s.io/utils/pointer
 k8s.io/utils/trace
-# knative.dev/eventing v0.24.0
+# knative.dev/eventing v0.24.2
 ## explicit
 knative.dev/eventing/pkg/apis/config
 knative.dev/eventing/pkg/apis/duck
@@ -927,7 +927,7 @@ knative.dev/eventing/test/test_images/recordevents
 # knative.dev/hack v0.0.0-20210622141627-e28525d8d260
 ## explicit
 knative.dev/hack
-# knative.dev/pkg v0.0.0-20210622173328-dd0db4b05c80
+# knative.dev/pkg v0.0.0-20210902173607-953af0138c75
 ## explicit
 knative.dev/pkg/apis
 knative.dev/pkg/apis/duck