diff --git a/conf/pipeline/sarek/sbc_sharc.config b/conf/pipeline/sarek/sbc_sharc.config
index 95b3ee3..4ddf2ba 100644
--- a/conf/pipeline/sarek/sbc_sharc.config
+++ b/conf/pipeline/sarek/sbc_sharc.config
@@ -18,7 +18,7 @@ process {
     // error and retry handling
 
     errorStrategy = { task.exitStatus in [143,137,104,134,139,140,247] ? 'retry' : 'finish' }
-    maxRetries    = 1
+    maxRetries    = 2
 
 
     // process labels
@@ -75,7 +75,7 @@ process {
     }
 
     withName:'GATK4_MARKDUPLICATES' {
-        memory  = { check_max( 16.GB * task.attempt, 'memory' ) }
+        memory  = { check_max( 20.GB * task.attempt, 'memory' ) }
     }
 
     withName:'FREEBAYES|SAMTOOLS_STATS|SAMTOOLS_INDEX|UNZIP' {