diff --git a/vendor/google.golang.org/grpc/vet.sh b/vendor/google.golang.org/grpc/vet.sh
index d923187..a8e4732 100644
--- a/vendor/google.golang.org/grpc/vet.sh
+++ b/vendor/google.golang.org/grpc/vet.sh
@@ -41,16 +41,8 @@
     github.com/client9/misspell/cmd/misspell
   popd
   if [[ -z "${VET_SKIP_PROTO}" ]]; then
-    if [[ "${TRAVIS}" = "true" ]]; then
-      PROTOBUF_VERSION=3.14.0
-      PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip
-      pushd /home/travis
-      wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME}
-      unzip ${PROTOC_FILENAME}
-      bin/protoc --version
-      popd
-    elif [[ "${GITHUB_ACTIONS}" = "true" ]]; then
-      PROTOBUF_VERSION=3.14.0
+    if [[ "${GITHUB_ACTIONS}" = "true" ]]; then
+      PROTOBUF_VERSION=22.0 # a.k.a v4.22.0 in pb.go files.
       PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip
       pushd /home/runner/go
       wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME}
@@ -66,8 +58,20 @@
   die "Unknown argument(s): $*"
 fi
 
+# - Check that generated proto files are up to date.
+if [[ -z "${VET_SKIP_PROTO}" ]]; then
+  make proto && git status --porcelain 2>&1 | fail_on_output || \
+    (git status; git --no-pager diff; exit 1)
+fi
+
+if [[ -n "${VET_ONLY_PROTO}" ]]; then
+  exit 0
+fi
+
 # - Ensure all source files contain a copyright message.
-not git grep -L "\(Copyright [0-9]\{4,\} gRPC authors\)\|DO NOT EDIT" -- '*.go'
+# (Done in two parts because Darwin "git grep" has broken support for compound
+# exclusion matches.)
+(grep -L "DO NOT EDIT" $(git grep -L "\(Copyright [0-9]\{4,\} gRPC authors\)" -- '*.go') || true) | fail_on_output
 
 # - Make sure all tests in grpc and grpc/test use leakcheck via Teardown.
 not grep 'func Test[^(]' *_test.go
@@ -81,7 +85,7 @@
 git grep -l '"math/rand"' -- "*.go" 2>&1 | not grep -v '^examples\|^stress\|grpcrand\|^benchmark\|wrr_test'
 
 # - Do not call grpclog directly. Use grpclog.Component instead.
-git grep -l 'grpclog.I\|grpclog.W\|grpclog.E\|grpclog.F\|grpclog.V' -- "*.go" | not grep -v '^grpclog/component.go\|^internal/grpctest/tlogger_test.go'
+git grep -l -e 'grpclog.I' --or -e 'grpclog.W' --or -e 'grpclog.E' --or -e 'grpclog.F' --or -e 'grpclog.V' -- "*.go" | not grep -v '^grpclog/component.go\|^internal/grpctest/tlogger_test.go'
 
 # - Ensure all ptypes proto packages are renamed when importing.
 not git grep "\(import \|^\s*\)\"github.com/golang/protobuf/ptypes/" -- "*.go"
@@ -91,13 +95,6 @@
 
 misspell -error .
 
-# - Check that generated proto files are up to date.
-if [[ -z "${VET_SKIP_PROTO}" ]]; then
-  PATH="/home/travis/bin:${PATH}" make proto && \
-    git status --porcelain 2>&1 | fail_on_output || \
-    (git status; git --no-pager diff; exit 1)
-fi
-
 # - gofmt, goimports, golint (with exceptions for generated code), go vet,
 # go mod tidy.
 # Perform these checks on each module inside gRPC.
@@ -107,9 +104,9 @@
   go vet -all ./... | fail_on_output
   gofmt -s -d -l . 2>&1 | fail_on_output
   goimports -l . 2>&1 | not grep -vE "\.pb\.go"
-  golint ./... 2>&1 | not grep -vE "/testv3\.pb\.go:"
+  golint ./... 2>&1 | not grep -vE "/grpc_testing_not_regenerate/.*\.pb\.go:"
 
-  go mod tidy
+  go mod tidy -compat=1.17
   git status --porcelain 2>&1 | fail_on_output || \
     (git status; git --no-pager diff; exit 1)
   popd
@@ -119,8 +116,9 @@
 #
 # TODO(dfawley): don't use deprecated functions in examples or first-party
 # plugins.
+# TODO(dfawley): enable ST1019 (duplicate imports) but allow for protobufs.
 SC_OUT="$(mktemp)"
-staticcheck -go 1.9 -checks 'inherit,-ST1015' ./... > "${SC_OUT}" || true
+staticcheck -go 1.19 -checks 'inherit,-ST1015,-ST1019,-SA1019' ./... > "${SC_OUT}" || true
 # Error if anything other than deprecation warnings are printed.
 not grep -v "is deprecated:.*SA1019" "${SC_OUT}"
 # Only ignore the following deprecated types/fields/functions.
@@ -147,7 +145,6 @@
 grpc.RPCCompressor
 grpc.RPCDecompressor
 grpc.ServiceConfig
-grpc.WithBalancerName
 grpc.WithCompressor
 grpc.WithDecompressor
 grpc.WithDialer