diff --git a/stubs/protobuf/METADATA.toml b/stubs/protobuf/METADATA.toml
index 6967a3b44534..8d682de02314 100644
--- a/stubs/protobuf/METADATA.toml
+++ b/stubs/protobuf/METADATA.toml
@@ -1,2 +1,2 @@
-version = "3.20.*"
+version = "4.21.*"
 extra_description = "Generated with aid from mypy-protobuf v3.3.0"