diff --git a/config/cluster_config.json b/config/cluster_config.json
index a73b66d389516041d5ae215ca8f4eddf70e595da..37e5b79d5433a6c16449bdd83cc9ac472a1f2adf 100644
--- a/config/cluster_config.json
+++ b/config/cluster_config.json
@@ -37,6 +37,10 @@
 	"kallisto_index" :
 	{
 		"ram" : "60G"
+	},
+	"mark_duplicates":
+	{
+		"ram" : "30G"
 	}
 
 }