diff --git a/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/KrakenReportToJson.scala b/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/KrakenReportToJson.scala
index 475d0b0b2e1f4d5837d77d0785cad6a0158fbbdb..fbea0965ca7fa3c75d630fb3bfe9a0272584ba27 100644
--- a/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/KrakenReportToJson.scala
+++ b/public/biopet-tools-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/tools/KrakenReportToJson.scala
@@ -28,7 +28,7 @@ class KrakenReportToJson(val root: Configurable) extends ToolCommandFunction wit
   @Output(doc = "Output JSON", shortName = "output", required = true)
   var output: File = _
 
-  override def defaultCoreMemory = 1.0
+  override def defaultCoreMemory = 2.0
 
   override def cmdLine =
     super.cmdLine +