diff --git a/Gopkg.lock b/Gopkg.lock
index 289043f3..6dddbbe1 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -966,7 +966,7 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:583ece64b8c1e09d59dbd6a94962f18c4c6a2cfe5d7c4f66584bc0f39af3efc9"
+  digest = "1:80c0e243552e01cdec518680967f72e6a435c4277b97b3ebf2e08f6590a389e7"
   name = "knative.dev/pkg"
   packages = [
     "apis",
@@ -986,18 +986,18 @@
     "reconciler",
   ]
   pruneopts = "T"
-  revision = "f384223ab1b897e96e222e1b86370e1ebcba9ccd"
+  revision = "9147309d53665ac87d8a5a17dabdbe3e24c97d13"
 
 [[projects]]
   branch = "master"
-  digest = "1:50482e6fd500cf50c4a29d640cda026206145c6716dff72e4368a5e57fdb7095"
+  digest = "1:dc73d65f40ea05b1d0db96ae5491b6ebc162bb59b3ac5a252cdf87848bc7a4b7"
   name = "knative.dev/test-infra"
   packages = [
     "scripts",
     "tools/dep-collector",
   ]
   pruneopts = "UT"
-  revision = "9fa5882b65c5fe7e177bb74874e9a5ac87b84e98"
+  revision = "5e04d955cdb9a460b5d3f2a699bddcab22c8af94"
 
 [[projects]]
   digest = "1:8730e0150dfb2b7e173890c8b9868e7a273082ef8e39f4940e3506a481cf895c"
diff --git a/vendor/knative.dev/pkg/OWNERS_ALIASES b/vendor/knative.dev/pkg/OWNERS_ALIASES
index 8b64a318..029964e4 100644
--- a/vendor/knative.dev/pkg/OWNERS_ALIASES
+++ b/vendor/knative.dev/pkg/OWNERS_ALIASES
@@ -21,6 +21,7 @@ aliases:
   - mattmoor
   - mdemirhan
   - dprotaso
+  - vagababov
 
   controller-approvers:
   - dgerd
diff --git a/vendor/knative.dev/pkg/logging/config b/vendor/knative.dev/pkg/logging/config
new file mode 100644
index 00000000..2480fc6d
--- /dev/null
+++ b/vendor/knative.dev/pkg/logging/config
@@ -0,0 +1,4 @@
+# The OWNERS file is used by prow to automatically merge approved PRs.
+
+approvers:
+- configmap-approvers
diff --git a/vendor/knative.dev/pkg/tracing/config/tracing.go b/vendor/knative.dev/pkg/tracing/config/tracing.go
index f4e95436..eaa2bb6d 100644
--- a/vendor/knative.dev/pkg/tracing/config/tracing.go
+++ b/vendor/knative.dev/pkg/tracing/config/tracing.go
@@ -65,13 +65,17 @@ func (cfg *Config) Equals(other *Config) bool {
 	return reflect.DeepEqual(other, cfg)
 }
 
-// NewTracingConfigFromMap returns a Config given a map corresponding to a ConfigMap
-func NewTracingConfigFromMap(cfgMap map[string]string) (*Config, error) {
-	tc := Config{
+func defaultConfig() *Config {
+	return &Config{
 		Backend:    None,
 		Debug:      false,
 		SampleRate: 0.1,
 	}
+}
+
+// NewTracingConfigFromMap returns a Config given a map corresponding to a ConfigMap
+func NewTracingConfigFromMap(cfgMap map[string]string) (*Config, error) {
+	tc := defaultConfig()
 
 	if backend, ok := cfgMap[backendKey]; ok {
 		switch bt := BackendType(backend); bt {
@@ -120,12 +124,15 @@ func NewTracingConfigFromMap(cfgMap map[string]string) (*Config, error) {
 	if sampleRate, ok := cfgMap[sampleRateKey]; ok {
 		sampleRateFloat, err := strconv.ParseFloat(sampleRate, 64)
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse sampleRate in tracing config: %v", err)
+			return nil, fmt.Errorf("failed to parse sampleRate in tracing config: %w", err)
+		}
+		if sampleRateFloat < 0 || sampleRateFloat > 1 {
+			return nil, fmt.Errorf("sampleRate = %v must be in [0, 1] range", sampleRateFloat)
 		}
 		tc.SampleRate = sampleRateFloat
 	}
 
-	return &tc, nil
+	return tc, nil
 }
 
 // NewTracingConfigFromConfigMap returns a Config for the given configmap
diff --git a/vendor/knative.dev/test-infra/scripts/presubmit-tests.sh b/vendor/knative.dev/test-infra/scripts/presubmit-tests.sh
index c01adcb5..bdd74754 100755
--- a/vendor/knative.dev/test-infra/scripts/presubmit-tests.sh
+++ b/vendor/knative.dev/test-infra/scripts/presubmit-tests.sh
@@ -129,7 +129,7 @@ function markdown_build_tests() {
   (( DISABLE_MD_LINTING && DISABLE_MD_LINK_CHECK )) && return 0
   # Get changed markdown files (ignore /vendor, github templates, and deleted files)
   local mdfiles=""
-  for file in $(echo "${CHANGED_FILES}" | grep \.md$ | grep -v ^vendor/ | grep -v ^.github/); do
+  for file in $(echo "${CHANGED_FILES}" | grep \\.md$ | grep -v ^vendor/ | grep -v ^.github/); do
     [[ -f "${file}" ]] && mdfiles="${mdfiles} ${file}"
   done
   [[ -z "${mdfiles}" ]] && return 0