diff --git a/rtg.wdl b/rtg.wdl
index c528c3a1043255d9aae1c006c7713f34c7f4eb18..10856eea275f4b7d5a59e769a261e8928d9f6789 100644
--- a/rtg.wdl
+++ b/rtg.wdl
@@ -75,8 +75,8 @@ task VcfEval {
         Boolean squashPloidy = false
         String outputMode = "split"
         Int threads = 1  # tool default is number of cores in the system 😱
-        String rtgMem = "4G"
-        String memory = "8G"
+        String rtgMem = "8G"
+        String memory = "16G"
         String dockerImage = "quay.io/biocontainers/rtg-tools:3.10.1--0"
     }