diff --git a/packages/smithy/smithy_codegen/pubspec.yaml b/packages/smithy/smithy_codegen/pubspec.yaml
index d92bef6ed4..a8ab74839e 100644
--- a/packages/smithy/smithy_codegen/pubspec.yaml
+++ b/packages/smithy/smithy_codegen/pubspec.yaml
@@ -25,7 +25,7 @@ dependencies:
   json_annotation: ^4.9.0
   meta: ^1.16.0
   path: ^1.8.0
-  protobuf: ^4.1.0
+  protobuf: ^5.0.0
   pub_semver: ^2.2.0
   pubspec_parse: ^1.2.2
   shelf: ^1.1.0