diff --git a/packages/smithy/smithy_codegen/pubspec.yaml b/packages/smithy/smithy_codegen/pubspec.yaml
index a1f38e93e5d..7bf76fd6753 100644
--- a/packages/smithy/smithy_codegen/pubspec.yaml
+++ b/packages/smithy/smithy_codegen/pubspec.yaml
@@ -19,7 +19,7 @@ dependencies:
   crclib: ^3.0.0
   dart_style: ^3.0.1
   fixnum: ^1.0.0
-  grpc: ^3.0.2
+  grpc: ^4.0.4
   html2md: ^1.2.5
   jmespath: ^2.0.0
   json_annotation: ">=4.9.0 <4.10.0"