diff --git a/lib/aws-xray-sdk/sampling/connector.rb b/lib/aws-xray-sdk/sampling/connector.rb
index 8f7d643..b31d091 100644
--- a/lib/aws-xray-sdk/sampling/connector.rb
+++ b/lib/aws-xray-sdk/sampling/connector.rb
@@ -37,7 +37,8 @@ def update_xray_client(ip: '127.0.0.1', port: 2000)
       @xray_client = Aws::XRay::Client.new(
         endpoint: %(http://#{ip}:#{port}),
         access_key_id: 'dummy', # AWS Ruby SDK doesn't support unsigned request
-        secret_access_key: 'dummy'
+        secret_access_key: 'dummy',
+        region: 'us-west-2' # not used
       )
     end