diff --git a/distributed-services-with-go/src/proglog/ObserveYourServices/go.mod b/distributed-services-with-go/src/proglog/ObserveYourServices/go.mod
index f476797..09c73e7 100644
--- a/distributed-services-with-go/src/proglog/ObserveYourServices/go.mod
+++ b/distributed-services-with-go/src/proglog/ObserveYourServices/go.mod
@@ -11,7 +11,7 @@ require (
 	go.uber.org/zap v1.24.0
 	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
 	google.golang.org/grpc v1.50.0
-	google.golang.org/protobuf v1.28.1
+	google.golang.org/protobuf v1.33.0
 )
 
 require (
diff --git a/distributed-services-with-go/src/proglog/ObserveYourServices/go.sum b/distributed-services-with-go/src/proglog/ObserveYourServices/go.sum
index 011f507..10f705a 100644
--- a/distributed-services-with-go/src/proglog/ObserveYourServices/go.sum
+++ b/distributed-services-with-go/src/proglog/ObserveYourServices/go.sum
@@ -167,8 +167,8 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 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/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=