diff --git a/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.mod b/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.mod
index 01cacccff..2244a44ee 100644
--- a/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.mod
+++ b/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.mod
@@ -13,5 +13,5 @@ require (
 	github.com/prometheus/common v0.37.0 // indirect
 	github.com/prometheus/procfs v0.8.0 // indirect
 	golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 )
diff --git a/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.sum b/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.sum
index b82ca8fa1..d2fafc078 100644
--- a/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.sum
+++ b/custom-metrics-stackdriver-adapter/examples/prometheus-to-sd/go.sum
@@ -453,8 +453,8 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=