diff --git a/go.mod b/go.mod
index 44d0fd90..4ac12202 100644
--- a/go.mod
+++ b/go.mod
@@ -14,5 +14,5 @@ require (
 	github.com/vmihailenco/msgpack/v4 v4.3.12
 	google.golang.org/grpc v1.45.0
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.2.0
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/protobuf v1.28.0
 )
diff --git a/go.sum b/go.sum
index b98747ac..eef9e75f 100644
--- a/go.sum
+++ b/go.sum
@@ -189,8 +189,9 @@ 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 v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
+google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/tfprotov5/internal/tfplugin5/tfplugin5.pb.go b/tfprotov5/internal/tfplugin5/tfplugin5.pb.go
index 2490b00e..326a58bb 100644
--- a/tfprotov5/internal/tfplugin5/tfplugin5.pb.go
+++ b/tfprotov5/internal/tfplugin5/tfplugin5.pb.go
@@ -19,7 +19,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
+// 	protoc-gen-go v1.28.0
 // 	protoc        v3.19.4
 // source: tfplugin5.proto
 
diff --git a/tfprotov6/internal/tfplugin6/tfplugin6.pb.go b/tfprotov6/internal/tfplugin6/tfplugin6.pb.go
index 92ab7e4e..a61e1875 100644
--- a/tfprotov6/internal/tfplugin6/tfplugin6.pb.go
+++ b/tfprotov6/internal/tfplugin6/tfplugin6.pb.go
@@ -19,7 +19,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
+// 	protoc-gen-go v1.28.0
 // 	protoc        v3.19.4
 // source: tfplugin6.proto