diff --git a/go.mod b/go.mod
index 3893c5786..1b8db5a0b 100644
--- a/go.mod
+++ b/go.mod
@@ -14,8 +14,8 @@ require (
 	k8s.io/api v0.20.7
 	k8s.io/apimachinery v0.20.7
 	k8s.io/client-go 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
 	knative.dev/serving v0.24.0
 )
diff --git a/go.sum b/go.sum
index 0fbc9de93..6c9385dcd 100644
--- a/go.sum
+++ b/go.sum
@@ -1583,15 +1583,16 @@ k8s.io/utils v0.0.0-20201110183641-67b214c5f920/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 v0.0.0-20210622183028-95f67e075071/go.mod h1:9gwZcCBtmo9pi1oTgchXcdMNAXAYWklwDmO9uhDsIJE=
-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/networking v0.0.0-20210622182128-53f45d6d2cfa h1:MprAGBX3eRaBZFRXC3ZjsnhnjttfprRVXdxmTeEzC2o=
 knative.dev/networking v0.0.0-20210622182128-53f45d6d2cfa/go.mod h1:vwPACNE712tyoEG4fjyUIgfL4xkbXFugx8bxW+QrKn4=
-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=
 knative.dev/serving v0.24.0 h1:MZIXR0r2FCXlTuQQXwLuM9+tV6pl2K6YUtK6tEtDB58=
 knative.dev/serving v0.24.0/go.mod h1:l/dhsWs+Y8PAssBxaS/hN4HRQQGy4zxfVHD1xYjl3ns=
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 f7660719e..45ba19f44 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -914,7 +914,7 @@ 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/adapter/v2
 knative.dev/eventing/pkg/adapter/v2/util/crstatusevent
@@ -967,7 +967,7 @@ knative.dev/hack
 knative.dev/networking/pkg
 knative.dev/networking/pkg/apis/networking
 knative.dev/networking/pkg/apis/networking/v1alpha1
-# 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