From bd4a4b88d161da98e15be913b91710931ceb72ab Mon Sep 17 00:00:00 2001
From: George Fu <georgfu@amazon.com>
Date: Fri, 25 Nov 2022 19:25:31 +0000
Subject: [PATCH] fix(service): use service signatureVersion as default

---
 lib/region_config.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/region_config.js b/lib/region_config.js
index f401383d7f..55614581dc 100644
--- a/lib/region_config.js
+++ b/lib/region_config.js
@@ -63,7 +63,9 @@ function configureEndpoint(service) {
       }
 
       // signature version
-      if (!config.signatureVersion) config.signatureVersion = 'v4';
+      if (!config.signatureVersion) {
+        config.signatureVersion = service.signatureVersion || 'v4';
+      }
 
       // merge config
       applyConfig(service, config);