diff --git a/pipes/WDL/tasks/tasks_utils.wdl b/pipes/WDL/tasks/tasks_utils.wdl
index 15d71c27b..89b1a8996 100644
--- a/pipes/WDL/tasks/tasks_utils.wdl
+++ b/pipes/WDL/tasks/tasks_utils.wdl
@@ -354,10 +354,10 @@ task tsv_join {
 
   runtime {
     memory: "~{machine_mem_gb} GB"
-    cpu: 2
+    cpu: 4
     docker: "quay.io/broadinstitute/viral-core:2.1.33"
     disks: "local-disk 100 HDD"
-    dx_instance_type: "mem1_ssd1_v2_x2"
+    dx_instance_type: "mem1_ssd1_v2_x4"
     maxRetries: 2
   }
 }
diff --git a/pipes/WDL/workflows/sarscov2_nextstrain.wdl b/pipes/WDL/workflows/sarscov2_nextstrain.wdl
index 789ddf040..7e35e18ee 100644
--- a/pipes/WDL/workflows/sarscov2_nextstrain.wdl
+++ b/pipes/WDL/workflows/sarscov2_nextstrain.wdl
@@ -85,7 +85,7 @@ workflow sarscov2_nextstrain {
                 input_tsvs     = sample_metadata_tsvs,
                 id_col         = 'strain',
                 out_basename   = "metadata-merged",
-                machine_mem_gb = 16
+                machine_mem_gb = 30
         }
     }
     call nextstrain.derived_cols {
diff --git a/pipes/WDL/workflows/sarscov2_nextstrain_aligned_input.wdl b/pipes/WDL/workflows/sarscov2_nextstrain_aligned_input.wdl
index 83168a834..9d8410ecc 100644
--- a/pipes/WDL/workflows/sarscov2_nextstrain_aligned_input.wdl
+++ b/pipes/WDL/workflows/sarscov2_nextstrain_aligned_input.wdl
@@ -67,7 +67,7 @@ workflow sarscov2_nextstrain_aligned_input {
                 input_tsvs   = sample_metadata_tsvs,
                 id_col       = 'strain',
                 out_basename = "metadata-merged",
-                machine_mem_gb = 16
+                machine_mem_gb = 30
         }
     }
     call nextstrain.derived_cols {