diff --git a/auth/oauth2adapt/go.mod b/auth/oauth2adapt/go.mod
index 4a2d2fe97cd0..504228c8f7cf 100644
--- a/auth/oauth2adapt/go.mod
+++ b/auth/oauth2adapt/go.mod
@@ -13,5 +13,5 @@ require (
 	golang.org/x/crypto v0.21.0 // indirect
 	golang.org/x/sys v0.18.0 // indirect
 	google.golang.org/appengine v1.6.8 // indirect
-	google.golang.org/protobuf v1.32.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 )
diff --git a/auth/oauth2adapt/go.sum b/auth/oauth2adapt/go.sum
index f62af61d69f2..e86c4c044a9a 100644
--- a/auth/oauth2adapt/go.sum
+++ b/auth/oauth2adapt/go.sum
@@ -52,5 +52,5 @@ google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:
 google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
 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 v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
-google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=