diff --git a/conf/sage.config b/conf/sage.config
index bfe1e09..4692ed2 100644
--- a/conf/sage.config
+++ b/conf/sage.config
@@ -30,11 +30,14 @@ aws {
   client {
     uploadChunkSize = 209715200
   }
+  batch {
+    maxParallelTransfers = 1
+  }
 }
 executor {
     name = 'awsbatch'
     // Ensure unlimited queue size on AWS Batch
-    queueSize = 100000
+    queueSize = 500
     // Slow down the rate at which AWS Batch jobs accumulate in
     // the queue (an attempt to prevent orphaned EBS volumes)
     submitRateLimit = '5 / 1 sec'