diff --git a/clients/client-neptune-graph/src/auth/httpAuthSchemeProvider.ts b/clients/client-neptune-graph/src/auth/httpAuthSchemeProvider.ts
index 92bcafc1200f..495a4c93a0eb 100644
--- a/clients/client-neptune-graph/src/auth/httpAuthSchemeProvider.ts
+++ b/clients/client-neptune-graph/src/auth/httpAuthSchemeProvider.ts
@@ -60,7 +60,7 @@ function createAwsAuthSigv4HttpAuthOption(authParameters: NeptuneGraphHttpAuthSc
       name: "neptune-graph",
       region: authParameters.region,
     },
-    propertiesExtractor: (config: NeptuneGraphClientConfig, context) => ({
+    propertiesExtractor: (config: Partial<NeptuneGraphClientConfig>, context) => ({
       /**
        * @internal
        */
diff --git a/codegen/sdk-codegen/aws-models/neptune-graph.json b/codegen/sdk-codegen/aws-models/neptune-graph.json
index 501ca55b5105..419199b113b4 100644
--- a/codegen/sdk-codegen/aws-models/neptune-graph.json
+++ b/codegen/sdk-codegen/aws-models/neptune-graph.json
@@ -5215,7 +5215,7 @@
       "type": "integer",
       "traits": {
         "smithy.api#range": {
-          "min": 128,
+          "min": 32,
           "max": 24576
         }
       }