diff --git a/packages/smithy/smithy_codegen/pubspec.yaml b/packages/smithy/smithy_codegen/pubspec.yaml
index c0c4bb702d..2a5d4804cd 100644
--- a/packages/smithy/smithy_codegen/pubspec.yaml
+++ b/packages/smithy/smithy_codegen/pubspec.yaml
@@ -43,7 +43,7 @@ dev_dependencies:
   build_verify: ^3.0.0
   build_version: ^2.1.0
   built_value_generator: 8.8.1
-  json_serializable: 6.8.0
+  json_serializable: 6.9.0
   smithy_test:
     path: ../smithy_test
   test: ^1.22.1