diff --git a/generators/protoc-gen-go-googlecetypes/go.mod b/generators/protoc-gen-go-googlecetypes/go.mod
index 2d9d796..dd1f3eb 100644
--- a/generators/protoc-gen-go-googlecetypes/go.mod
+++ b/generators/protoc-gen-go-googlecetypes/go.mod
@@ -2,4 +2,4 @@ module github.com/googleapis/google-cloudevents-go/generators/protoc-gen-go-goog
 
 go 1.20
 
-require google.golang.org/protobuf v1.33.0
+require google.golang.org/protobuf v1.34.2
diff --git a/generators/protoc-gen-go-googlecetypes/go.sum b/generators/protoc-gen-go-googlecetypes/go.sum
index f63a45a..4e4778a 100644
--- a/generators/protoc-gen-go-googlecetypes/go.sum
+++ b/generators/protoc-gen-go-googlecetypes/go.sum
@@ -2,3 +2,5 @@ github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
 google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=