diff --git a/packages/rds-signer/src/runtimeConfig.ts b/packages/rds-signer/src/runtimeConfig.ts
index f413d71bae1a..247f132e1280 100644
--- a/packages/rds-signer/src/runtimeConfig.ts
+++ b/packages/rds-signer/src/runtimeConfig.ts
@@ -10,10 +10,10 @@ import { SignerConfig } from "./Signer";
  */
 export const getRuntimeConfig = (config: SignerConfig) => {
   return {
+    ...config,
     runtime: "node",
     sha256: config?.sha256 ?? Hash.bind(null, "sha256"),
     credentials: config?.credentials ?? fromNodeProviderChain(),
     region: config?.region ?? loadConfig(NODE_REGION_CONFIG_OPTIONS, NODE_REGION_CONFIG_FILE_OPTIONS),
-    ...config,
   };
 };